Supplement analysis backed by scientific evidence · PT · ES · DE · FR

← All supplements
Limited evidenceGeneral health

Royal Jelly

Expensive, heavily marketed, and thinly supported: the one clean meta-analysis found no effect on blood sugar, and the menopause and fertility claims rest on isolated small trials. The best-documented real-world effect is a risk of severe allergic reactions.

View on iHerb Ships to 180+ countries · welcome discount for new customers

What the science says

  • Blood glucose and HbA1c Limited evidence

    A meta-analysis of 5 RCTs (205 participants for fasting glucose, 130 for HbA1c) found royal jelly lowered fasting plasma glucose by just 0.95 mg/dL (95% CI -5.83 to 3.87) and HbA1c by 0.32 points (95% CI -0.87 to 0.23) — neither statistically significant. This is a clear null result, not an underpowered hint.

  • Postmenopausal bone density Limited evidence

    In a 6-month double-blind RCT of 72 postmenopausal women taking dried royal jelly equivalent to 3,000 mg fresh daily, the placebo group lost femoral bone mineral density while the royal jelly group did not. But the authors report within-group rather than significant between-group differences, which is the weakest form of positive finding — hypothesis-generating at best.

  • Fertility, testosterone, and anti-aging effects Limited evidence

    These claims come almost entirely from rodent and in vitro work on 10-HDA and royalactin. There is no adequately powered human RCT supporting royal jelly for male fertility, testosterone, longevity, or skin aging.

Dosage & safety

Studied doseTrials used 1,000-3,000 mg/day of fresh-equivalent royal jelly for 8 weeks to 6 months. 10-HDA (10-hydroxy-2-decenoic acid) is the conventional standardization marker but is rarely declared on labels, so dose comparisons across products are largely meaningless.
SafetyRoyal jelly is a documented cause of anaphylaxis, acute bronchospasm, and severe eczema flares, with fatalities reported; risk is highest in people with asthma or atopy. Australia's TGA mandates an anaphylaxis warning on royal jelly products for this reason. Avoid entirely with any bee-product allergy. Unstudied in pregnancy. Contains compounds with weak estrogenic activity in vitro, so caution is usually advised in hormone-sensitive conditions, though human data are absent. Anticoagulant interaction has been reported in isolated case reports with warfarin.

How to take it

TimingTiming does not matter.
With food?Food makes no meaningful difference.
Worth knowing10-HDA content is the only meaningful way to compare products and almost no label declares it, so dose comparisons between brands are largely guesswork.

Interactions

With medications

  • warfarin

    Isolated case reports describe raised INR after starting royal jelly. tell your prescriber and have your INR checked after starting

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Does royal jelly lower blood sugar?

No: a meta-analysis of 5 randomised trials found royal jelly had no significant effect on fasting glucose or HbA1c. This is a clear null result, not an underpowered hint.

Does royal jelly boost fertility, testosterone or slow aging?

Claims that royal jelly improves fertility, testosterone, longevity or skin aging come almost entirely from rodent and in vitro work. There is no adequately powered human trial supporting any of them, so the evidence is limited.

Is royal jelly safe?

Royal jelly is a documented cause of anaphylaxis, acute bronchospasm and severe eczema flares, with fatalities reported, and the risk is highest with asthma or atopy. Avoid royal jelly entirely if you have any bee-product allergy, and have your INR checked if you take warfarin.

Does royal jelly help bone density after menopause?

One 6-month trial in 72 postmenopausal women found the placebo group lost hip bone density while the royal jelly group did not, but it did not report a significant difference between groups. This limited evidence is hypothesis-generating at best.

Scientific references

Where to buy

NOW Foods, Ginseng & Royal Jelly, 90 Capsules

View on iHerb

Ships to 180+ countries · welcome discount for new customers

Referral link — this site may earn a commission on purchases.

Related in General health