Royal jelly benefits: what science shows, side effects, FDA rules and storage

Royal jelly is a creamy secretion that young worker bees make in glands in their heads to feed every larva for its first few days and the future queen for her entire development. The honest answer on royal jelly benefits is that none has been firmly proven in people: human trials are small and inconsistent, the FDA does not approve it, and a label may not claim it treats or prevents any disease. What is documented is a real risk of severe allergic reactions, including asthma attacks and anaphylaxis, especially in people with asthma or allergies.

If you are considering a jar or a bottle of capsules, three things matter more than the marketing: your own allergy history, how the product has been stored, and what the label is legally allowed to promise.

What is royal jelly and what do bees use it for?

Made by nurse bees, not collected from flowers

Honey, pollen and propolis all start with something bees gather outside. Royal jelly does not. It is produced inside the hive by nurse bees, workers roughly one to two weeks old, from their hypopharyngeal and mandibular glands. Our guide to the honey bee colony explains how jobs are divided by age.

Fresh royal jelly is a thick, milky white to pale yellow paste with a sour, slightly peppery bite. It is acidic: the FAO gives a pH of 3.6 to 4.2 and a density of about 1.1 g/cm³.

Nurse bees deposit it in the bottom of the cells. Every larva, whether it will become a worker, a drone or a queen, is fed royal jelly at first. Then the menus split. Worker larvae switch to a diet that includes honey and pollen, while a larva in a queen cell keeps getting generous amounts of jelly. That feeding difference, not different genes, is what turns a female larva into a queen bee.

Where the “royal” comes from

The name refers to that queen diet. The adult queen is also fed by workers for the rest of her egg laying life. Because a queen can live several years while a summer worker lasts a few weeks, royal jelly gained a reputation as a longevity food. That is a big leap: what directs the development of a bee larva says nothing about what a few hundred milligrams do in an adult human.

What is in royal jelly?

Main components

Composition varies with season, bee stock, the colony’s diet and the age of the larvae at harvest. The FAO’s bulletin on hive products gives these ranges:

Component	Content	Basis
Water	57 to 70%, about two thirds	fresh jelly
Protein	17 to 45%	dry matter
Sugars, mostly fructose and glucose	18 to 52%	dry matter
Lipids	3.5 to 19%, of which 80 to 90% are free fatty acids	dry matter
Minerals (ash)	2 to 3%, about 1% of fresh weight	dry matter

In round numbers: fresh royal jelly is two thirds water, and the other third is split roughly among protein, sugars and fats.

10-HDA: the marker of genuine jelly

The fat fraction is unusual. It is made mostly of short fatty acids with 8 or 10 carbon atoms, led by 10-hydroxy-2-decenoic acid, or 10-HDA. No other natural food contains it at similar levels, so it is used to check authenticity and quality. Diluted, adulterated or poorly stored jelly has less of it.

The international standard ISO 12824:2016 sets specifications for royal jelly. For fresh jelly it calls for at least 1.4% 10-HDA, water between 62 and 68.5% and protein between 11 and 18%. It is a voluntary industry benchmark, not an FDA requirement.

Hormones and vitamins: tiny amounts

Royal jelly is sometimes marketed as a natural source of hormones. The FAO reports about 0.012 micrograms of testosterone per gram of fresh jelly and notes that an adult man makes 250,000 to a million times that amount every day. It also contains B vitamins, but at typical doses the amount is negligible next to an ordinary diet.

Royal jelly benefits: what does the research really show?

What the clinical studies say

The FAO’s review of hive products concluded that “none of the claimed therapeutic or other effects of royal jelly have been proven with certainty.” The firmest findings are:

• in bees, where its role in queen development is well established;
• in the lab, where 10-HDA has antibacterial activity, about a quarter of that of penicillin against a staphylococcus according to the FAO, which adds that this activity of the fatty acids is neutralized once the pH rises above 5.6, as it does in the body;
• in animals, results that do not translate directly to people.

Human trials have looked at cholesterol, menopause symptoms, weight and blood sugar. Recent reviews show how limited they are:

• Weight. A 2023 meta-analysis of 10 randomized trials with 512 participants found no significant effect on body weight, body mass index or body fat, and flagged short trials, inconsistent designs and poorly described products.
• Menopause. A 2026 meta-analysis included 6 studies and 471 women and found better symptom scores than placebo, but that pooled result rested on only 2 studies and 312 women, with certainty rated moderate by the authors.
• Cholesterol and blood sugar. Memorial Sloan Kettering Cancer Center’s integrative medicine service, which reviews supplements for patients, calls the cholesterol evidence very limited and notes that a meta-analysis found no improvement in blood glucose in people with diabetes.

The trials are generally small and short, and each used a different jelly, so results are hard to compare or pool. None is strong enough to recommend royal jelly to prevent or treat a condition.

How European regulators judged the same claims

Europe offers a useful comparison because its regulators formally assessed royal jelly. In 2011 the European Food Safety Authority reviewed twelve proposed health claims, covering immune support, vitality and fatigue, metabolism, skin health, menopause and cholesterol. For every one, it concluded that the royal jelly was “not sufficiently characterised” and that no cause and effect relationship could be established. As a result, no royal jelly health claim is authorized in the European Union. The US system works differently, as explained below, which is why American labels often say more than European ones.

The honest bottom line

Royal jelly is an interesting food that researchers are right to study. If you like taking it, know the risks and do not fall into a high risk group, there is no reason to stop you. But it is not a replacement for a varied diet, for medical treatment, or for a checkup if you are persistently tired. The same caution applies to honey and other hive products, as our guide to the health benefits of honey explains.

Royal jelly side effects: who should avoid it?

Allergic reactions are well documented

This is the most important section of the page. Royal jelly contains bee proteins, and one of them, major royal jelly protein 3, has been identified as a main allergen. The medical literature collected by Memorial Sloan Kettering includes:

• reports of acute asthma in Australian and New Zealand medical journals in the 1990s: Thien and colleagues in the Medical Journal of Australia in 1993, a 1994 report in the same journal by Bullock and colleagues titled “Fatal royal jelly-induced asthma”, and Harwood and colleagues in the New Zealand Medical Journal in 1996;
• several case reports of anaphylaxis after taking royal jelly, published between 2006 and 2021;
• a 1997 case of hemorrhagic colitis, bleeding inflammation of the colon.

The most recent of those anaphylaxis reports, from 2021, describes a 56-year-old woman in China who twice developed hives, swelling of the larynx, chest tightness and a drop in blood pressure that made her collapse, each time within an hour of taking royal jelly. Lab tests pointed to major royal jelly protein 3 as the cause.

The FAO cites a 1983 Japanese study in which 2 of 10 patients patch-tested had allergic contact dermatitis. France’s food safety agency, ANSES, reviewing reports to its own monitoring scheme in 2018, cited a 1997 survey of 1,472 hospital workers in Hong Kong: 9 of them, about 0.6%, reported reactions after eating royal jelly, from hives and eczema to runny nose and breathing trouble. ANSES also noted that royal jelly may contain pollen that is not declared on the label.

Australia and New Zealand require foods containing royal jelly to carry this warning: “This product contains royal jelly which has been reported to cause severe allergic reactions and, in rare cases, fatalities, especially in asthma and allergy sufferers.” US law has no equivalent mandatory royal jelly warning, so a label without one tells you nothing about safety.

Who should not take it

Your situation	What to do
Asthma	Avoid royal jelly
Seasonal allergies or pollen allergy	Avoid: pollen allergy is a known risk factor for reactions to hive products
Eczema, other atopic conditions or multiple allergies	Avoid
Allergy to bee stings, honey, pollen or propolis	Avoid
Taking warfarin or another blood thinner	Ask your doctor or pharmacist first: a published case linked royal jelly to a raised INR and bleeding
History of estrogen receptor positive breast cancer	Avoid unless your oncologist agrees: lab studies show estrogen-like activity
Pregnant, breastfeeding, or for a child	No safety data: ask your doctor, midwife or pharmacist first

Practical precautions

1. If you have never taken royal jelly, try a tiny amount for a few days before a full serving, as the FAO advises for any potentially allergenic substance.
2. Stop at once if you notice itching, a rash, swollen lips, chest tightness or wheezing.
3. Call 911 for trouble breathing, throat or tongue swelling, or fainting. If you carry an epinephrine auto-injector, use it.
4. Never exceed the serving on the Supplement Facts label, and avoid long or back to back courses without medical advice.
5. Check the full ingredient list of “energy” and “immune” blends: royal jelly is often combined with bee pollen or propolis, which adds to the allergy risk.

After a reaction, the FDA asks you to stop using the product immediately and file a report through its Safety Reporting Portal (safetyreporting.hhs.gov). Tell your doctor too, and keep the package and lot number.

What can a royal jelly supplement legally claim in the US?

No FDA approval before sale

Most royal jelly sold in the US, whether fresh in a jar, freeze-dried in capsules or in honey blends sold as supplements, is regulated as a dietary supplement under the Dietary Supplement Health and Education Act of 1994 (DSHEA). The FDA does not approve dietary supplements before they reach the market. Manufacturers and distributors are responsible for evaluating the safety and labeling of their products before marketing them, and the FDA can act afterward against products that are adulterated or misbranded.

Structure/function claims and the disclaimer

DSHEA allows structure/function claims: statements about how an ingredient affects the normal structure or function of the body, or general well-being. They are not pre-approved by the FDA, but the company must have evidence that the claim is truthful and not misleading. Under federal rules (21 CFR 101.93):

• the company must notify the FDA no later than 30 days after first marketing a supplement that carries such a statement;
• the label must carry this disclaimer: “This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.”

That is the small print, usually marked with an asterisk, that you see on almost every royal jelly bottle. Its presence means the FDA has not reviewed the claim, not that it has endorsed it.

Disease claims make it a drug

A supplement may not claim, explicitly or implicitly, to affect a disease or its characteristic symptoms. The regulation counts as disease claims not only direct statements but also product names, pictures and symbols, citations of disease-related publications, and claims that the product substitutes for or enhances a disease treatment. A royal jelly product presented as treating arthritis, infertility, asthma, high cholesterol, diabetes or hot flashes from menopause is making a drug claim, and a product marketed that way is an unapproved new drug in the eyes of the FDA.

In practice, you will see wording like this:

Type of wording	Example	Allowed on a supplement?
Structure/function	“supports energy” or “supports healthy skin”	Yes, with the FDA disclaimer and notification
General well-being	“for vitality”	Yes, with the disclaimer
Disease claim	“lowers cholesterol” or “relieves hot flashes”	No
Disease claim through imagery or name	a made-up example: a product named “ArthriJelly” with joint pain images	No

Health claims, which link a substance to a lower risk of a disease, are a separate category that the FDA must authorize or allow as a qualified claim. As of October 2026, royal jelly is not among the FDA’s authorized health claims, which cover pairs such as calcium and vitamin D with osteoporosis or soluble fiber with heart disease, and it does not appear in the FDA’s list of qualified health claims either. No royal jelly label can therefore make a disease risk reduction claim.

Notice the contrast with Europe and the UK, where vague promises such as “supports energy” are not allowed for royal jelly at all, because no health claim for it has been authorized there. In the US, the same wording can appear legally, but it carries no proof of effect. Misleading advertising, as opposed to labeling, is policed mainly by the Federal Trade Commission.

Origin

FDA supplement labeling rules do not require the label to name the country where the jelly was harvested, and many US labels give only the distributor’s address. Customs law is a separate layer: imported goods must generally show their country of origin to the ultimate purchaser, and when an importer repacks them into new containers, 19 CFR 134.26 requires the new container to be marked with the origin and the importer to certify this to US Customs and Border Protection. Goods that are processed in the US into a substantially new product can fall outside that marking duty.

Most of the world’s royal jelly comes from China. In the 1990s the FAO put Chinese output at 400 to 500 metric tons a year, about 60% of the world total; a 2023 review in the journal Molecules gives about 3,500 metric tons (roughly 3,900 short tons) a year, more than 90% of world production. Domestically produced fresh jelly is also offered by some US sellers. If origin matters to you, ask the seller where the jelly was harvested and how it was shipped.

How is royal jelly produced?

Producing royal jelly uses the skills of queen rearing, with one difference: the beekeeper harvests the queen cells before any queen can develop.

The idea: start queen cells, harvest early

A colony that senses it is queenless, or a section of the hive kept away from the queen, starts raising queens and floods their cells with jelly. Producers exploit that response. They give the colony dozens of artificial queen cups, each holding a very young larva, let the nurse bees provision them for three days, and take the jelly before the larva eats it.

One production cycle, step by step

1. Build very strong colonies. Only colonies packed with young nurse bees and well stocked with pollen and honey produce well. Jelly production costs the colony a lot of food.
2. Get larvae of the right age. Grafted larvae should be less than about 24 hours old.
3. Graft. In a warm, humid room, each larva is moved with a grafting tool into a plastic or wax cell cup on a cell bar frame. A drop of diluted royal jelly in the cup can improve acceptance.
4. Insert the frame. It goes into a queenless colony, or into a part of the hive separated from the queen by a queen excluder, next to open brood that draws in nurse bees.
5. Wait three days. The FAO places harvest three days after grafting, when the larvae are about four days old.
6. Harvest. Bees are brushed off, the cell tops are trimmed, each larva is lifted out with tweezers, and the jelly is suctioned out with a small vacuum pump or scooped with a spatula.
7. Chill immediately. The jelly goes into dark glass containers and straight into the refrigerator, away from sunlight.
8. Graft again. A new batch is usually grafted the same day.

The French researcher Maurice Vuillaume described this three day rhythm in 1958, with a new series of cells grafted at each harvest.

Yields: why royal jelly is scarce

Benchmark	Figure	Source
Jelly per well accepted cell	at least 200 mg, 250 mg for retail cell packs	FAO
Cycle	about every 3 days	FAO, Vuillaume
Output of one well managed hive	about 1.1 lb (500 g) over a 5 to 6 month season	FAO

A 1 oz (28 g) jar represents the contents of roughly 110 to 140 queen cells, each grafted by hand. A full season from one hive yields only about a pound.

Where you live in the US matters. Production depends on strong brood rearing and a steady flow of nectar and pollen, so in the Northeast, the Upper Midwest or the Pacific Northwest the practical window is limited to late spring and summer, while beekeepers in the South and in California have a longer season. Anyone already grafting for queen production has the core skill. Selling the jelly, however, brings food or supplement rules into play, including FDA labeling requirements, and the details of licensing differ by state, so check with your state department of agriculture before you sell.

How should you store royal jelly?

The basics

Fresh royal jelly is fragile. It oxidizes in air and breaks down with light and heat. The FAO calls refrigeration at 32 to 41°F (0 to 5°C) a minimum precaution.

Storage	Temperature	Typical shelf life	Source
Fresh, refrigerated	32 to 41°F (0 to 5°C)	about 18 months from production	FAO
Frozen, bulk jelly before packing	1°F (minus 17°C) or colder	up to 24 months	FAO
After thawing and packing	refrigerated	no more than 12 months	FAO
Freeze-dried powder	room temperature, dry	longer, but cool storage is still recommended	FAO

Sellers’ instructions are usually more conservative. One US seller of domestically sourced fresh jelly, for example, says its product can ship at room temperature and tolerate up to 7 days that way, but should be refrigerated or frozen on arrival.

At home

1. Put the jar in the refrigerator as soon as it arrives, on a shelf rather than in the door, where temperatures swing.
2. Keep it tightly closed in its original dark glass jar.
3. Use a clean, dry spoon, usually the small one provided, and close the lid right away.
4. Follow the date on the jar and any instructions after opening.

Jelly that has turned noticeably yellow or grainy, smells rancid or tastes very bitter has gone bad. Do not eat it.

Royal jelly dosage: how much and for how long?

No validated dose

Since no effect has been proven, there is no “effective” dose. The numbers you see come from tradition and from manufacturers:

• the FAO notes that commercial products are usually formulated to provide the equivalent of 200 to 300 mg of fresh jelly per dose;
• it also describes traditional use of 200 to 500 mg a day for one to two months, while stressing that the claimed effects are unproven;
• some products go much higher, and many are labeled in “fresh equivalent” rather than milligrams of powder, which makes the dose look bigger.

Fresh, freeze-dried, liquid and honey blends

Form	What it is	Equivalence	Storage
Fresh, in a jar	raw jelly as harvested	reference	refrigerated, 32 to 41°F (0 to 5°C)
Freeze-dried (powder, capsules, tablets)	jelly dried at low temperature	about 1 g for 3 g fresh	dry, room temperature
Liquid vials or shots	diluted jelly, often freeze-dried, with honey, vitamins or herbs	varies: read the label	as directed
Honey with royal jelly	a blend with a small proportion of jelly	100 to 300 mg per teaspoon in FAO examples	room temperature

The FAO gives 166 mg of freeze-dried jelly as the equivalent of 500 mg fresh, which is where the one to three ratio comes from. A capsule with 333 mg of powder is about 1,000 mg fresh equivalent, and a capsule labeled “1,000 mg fresh equivalent” may hold only about a third of a gram of powder. Always convert to the same basis before comparing.

If you decide to try it

1. Make sure none of the warnings above applies to you.
2. Start with the tip of a spoon for three or four days.
3. Tradition says to let it dissolve under the tongue in the morning on an empty stomach. There is no evidence this matters, but it does no harm. The tangy, peppery taste surprises many people, so you can stir it into a spoonful of honey.
4. Keep courses short, a few weeks, rather than year round.
5. Stop at the first sign of a reaction and talk to a pharmacist or doctor.

At the serving of about ¼ teaspoon (around 1 g) suggested by one US seller, a 1 oz (28 g) jar lasts about four weeks. At 500 mg a day, it lasts about eight weeks.

How much does royal jelly cost in the US?

Prices vary widely, and the differences come mostly from form, concentration and origin. In October 2026, one seller listed US-sourced fresh royal jelly at $79 including shipping, with a suggested serving of about ¼ teaspoon (about 1 g) a day, but its product page did not give the jar weight, which makes a per gram comparison impossible. A supplement retailer listed a 2 oz jar of Y.S. Organic Bee Farms fresh royal jelly at $38.99, with 50 servings of 1.2 g, or about 65 cents a gram; that page did not say where the jelly was produced. Missing weights and missing origins are common, and a good reason to read the label carefully.

To compare fairly, work out:

1. the price per gram of fresh jelly or fresh equivalent, not per bottle;
2. the form: liquid shots are mostly water or honey, and capsules are dried powder;
3. the storage: fresh jelly shipped warm for days, or kept on a store shelf, has lost part of what you paid for;
4. the origin: whether the label says where the jelly was harvested, not just where it was bottled or distributed.

For context, the FAO reported an international wholesale price of $50 to $80 per kilogram in the early 1990s, mainly for Chinese jelly. Those large Asian volumes are why mass market capsules can be inexpensive, while small batch domestic fresh jelly costs much more.

Royal jelly, honey, bee pollen and propolis: how do they compare?

Royal jelly is often sold next to honey, bee pollen and propolis in “superfood” lines. They come from different sources and have different compositions, but they share two things in the US: none is FDA approved to treat anything, and all can trigger allergies, especially in people allergic to pollen. Honey adds its own risk for babies, infant botulism, so no honey for children under 12 months.

Product	Made from	Key thing to know
Honey	nectar or honeydew, processed by bees	mostly sugars; never for babies under 1
Bee pollen	pollen pellets packed by foragers	high allergy risk for people with seasonal allergies
Propolis	plant resins mixed with beeswax	contact allergy is well documented
Royal jelly	gland secretion of nurse bees	asthma and anaphylaxis risk; keep refrigerated

To see how this jelly turns an ordinary larva into an egg laying queen, read our pages on the queen bee and, for beekeepers, queen rearing. Our other guides to propolis, pollen and beeswax are in the hive products section.

Frequently asked questions

What is royal jelly good for?

As a food, it supplies water, protein, sugars and an unusual fatty acid called 10-HDA. As a remedy, no benefit has been firmly proven. Small human trials on cholesterol, menopause symptoms and blood sugar give mixed or limited results, and the jellies tested vary widely. European regulators reviewed twelve health claims in 2011 and accepted none. Treat any promise of more energy or immunity with caution.

Is royal jelly FDA approved?

No. The FDA does not approve dietary supplements before they go on sale. Manufacturers are responsible for making sure their products are safe and their labels truthful. A royal jelly supplement may carry a structure/function statement with the FDA disclaimer, but it may not claim to diagnose, treat, cure or prevent a disease. Products that do are treated as unapproved drugs. No FDA-authorized health claim covers royal jelly either.

What are the side effects of royal jelly?

The serious ones are allergic: hives, eczema, acute asthma attacks and anaphylaxis have all been reported, and a 1994 Australian report described a death from royal jelly induced asthma. A case of bleeding inflammation of the colon has also been published. People with asthma, pollen allergies or eczema are at highest risk. If you have trouble breathing or throat swelling after taking it, call 911.

Who should not take royal jelly?

Skip it if you have asthma, seasonal allergies to pollen, eczema, or any allergy to bee stings, honey, pollen or propolis. Talk to your doctor or pharmacist first if you take warfarin or another blood thinner, have had estrogen receptor positive breast cancer, are pregnant or breastfeeding, or are thinking of giving it to a child. Stop immediately at any sign of itching or wheezing.

How much royal jelly should I take a day?

No dose has been scientifically validated because no benefit has been proven. Traditional use described by the FAO is 200 to 500 mg of fresh jelly a day for one to two months, and commercial products usually aim for about 200 to 300 mg fresh equivalent per dose. Follow the Supplement Facts label, never exceed it, and start with a tiny amount for a few days.

Do you have to refrigerate royal jelly?

Fresh royal jelly, yes. Keep it at 32 to 41°F (0 to 5°C) in its closed dark glass jar. The FAO gives about 18 months refrigerated from production and up to 24 months frozen for bulk jelly. Freeze-dried capsules and powders can be kept at room temperature in a dry place, although cool storage still helps. Always use a clean, dry spoon.

Is freeze-dried royal jelly as good as fresh?

It is the same material with the water taken out. About 166 mg of freeze-dried powder corresponds to 500 mg of fresh jelly, a ratio of roughly one to three. Capsules are more convenient and keep better at room temperature. When comparing labels, check whether the milligrams listed are powder or fresh weight equivalent, because the difference is threefold.

Does royal jelly help with menopause symptoms?

It might help a little, but that is not established. A 2026 meta-analysis found better symptom scores than placebo, but the pooled result came from just two trials with 312 women. A royal jelly label cannot legally claim to treat menopause symptoms. Effective treatments exist, so talk to your doctor or gynecologist before relying on a supplement.

Sources

1. Value-added products from beekeeping, chapter 6: Royal jelly (sections 6.1 to 6.7), FAO, R. Krell, Agricultural Services Bulletin 124
2. Value-added products from beekeeping, chapter 6: Royal jelly (sections 6.8 to 6.11), FAO, R. Krell, Agricultural Services Bulletin 124
3. Dietary Supplements, U.S. Food and Drug Administration
4. Authorized Health Claims That Meet the Significant Scientific Agreement (SSA) Standard, U.S. Food and Drug Administration
5. Qualified Health Claims: Letters of Enforcement Discretion, U.S. Food and Drug Administration
6. 19 CFR 134.26: Imported articles repacked or manipulated (country of origin marking), Legal Information Institute, Cornell Law School
7. 21 CFR 101.93: Certain types of statements for dietary supplements, Electronic Code of Federal Regulations (eCFR)
8. How to Report a Problem with Dietary Supplements, U.S. Food and Drug Administration
9. Royal Jelly: integrative medicine monograph (adverse reactions, interactions, clinical evidence), Memorial Sloan Kettering Cancer Center
10. Opinion on the risk of allergy related to the consumption of food supplements containing pollen or hive products (request 2017-SA-0215), ANSES, French Agency for Food, Environmental and Occupational Health and Safety
11. Warning and advisory statements (mandatory royal jelly warning under the Australia New Zealand Food Standards Code), NSW Food Authority
12. Scientific Opinion on the substantiation of health claims related to various food(s)/food constituent(s) not sufficiently characterised, including royal jelly (ID 1225 to 1228, 1230, 1231, 1326, 1328, 1329, 1982, 4696, 4697), pursuant to Article 13(1) of Regulation (EC) No 1924/2006, EFSA Journal 2011;9(4):2083, European Food Safety Authority, NDA Panel
13. The effects of royal jelly supplementation on anthropometric indices: a GRADE-assessed systematic review and dose-response meta-analysis of randomized controlled trials (Frontiers in Nutrition, 2023), M. Vajdi et al., Frontiers in Nutrition
14. Royal jelly for management of postmenopausal symptoms: a systematic review and meta-analysis (Menopause, 2026;33(4):501-509), S. Dagostin Ferraz et al., PubMed
15. ISO 12824:2016 Royal jelly, Specifications (official preview, table of physical and chemical requirements), ISO, preview distributed by SIST
16. Techniques d'élevage des reines. I. Le premier stade : élevage des cellules royales (Annales de l'Abeille, 1958), M. Vuillaume, Apidologie archive
17. Fresh Royal Jelly, 100% Pure U.S.-Sourced Bee Product (product page, price, storage and serving), Bee-licious Honey
18. Fresh Royal Jelly by Y.S. Organic Bee Farms, 2 oz (product page, price, serving size and storage), Professional Supplement Center
19. A case of anaphylaxis caused by major royal jelly protein 3 of royal jelly and its cross-reactivity with honeycomb (Journal of Asthma and Allergy, 2021;14:1555-1557), J.D. Li et al., Dove Medical Press
20. Current status of the bioactive properties of royal jelly: a comprehensive review (Molecules, 2023;28(3):1510), S. Botezan et al., MDPI