Royal Jelly 500 mg by Natural Factors

POSSIBLY EFFECTIVE

• Menopausal symptoms. Several clinical studies suggest that oral royal jelly, taken alone or in combination with other ingredients, modestly improves menopausal symptoms. It is unclear if topical royal jelly is beneficial for this use. Details: One clinical study in postmenopausal patients shows that taking royal jelly 1000 mg daily for 8 weeks reduces menopausal symptom scores by around 30% when compared with placebo (102527). Other small clinical studies show that taking one to two capsules of a specific combination product containing royal jelly and flower pollen (Melbrosia) daily for 12 weeks reduces menopausal symptoms and improves feelings of well-being when compared with baseline or placebo (18064,71956,72005). Another clinical trial in postmenopausal patients shows that taking two capsules of a specific combination product containing royal jelly, evening primrose oil, damiana, and ginseng (Lady 4) daily for 4 weeks decreases self-rated menopausal symptoms when compared with placebo (21003). Topical royal jelly has also been evaluated. A small clinical study in postmenopausal adults shows that applying vaginal cream containing royal jelly 15% daily for 12 weeks improves quality of life, sexual problems, and urinary problems similarly to vaginal estrogen cream 0.625 mg. However, estrogen cream improves vaginal atrophy better than royal jelly (92884).

POSSIBLY INEFFECTIVE

• Allergic rhinitis (hay fever). Oral royal jelly does not appear to prevent or treat symptoms of allergic rhinitis in children. Details: A clinical trial in children 5-16 years of age with allergic rhinitis shows that taking a specific royal jelly product (Bidro) 150 mg twice daily for 3-6 months before and during pollen season does not prevent or treat nasal congestion, sneezing, or eye discomfort when compared with placebo (71968).
• Diabetes. Oral royal jelly does not appear to improve glycemic control in patients with type 2 diabetes. Details: Most clinical research in patients with type 2 diabetes, along with a meta-analysis of five small clinical trials including patients with or without type 2 diabetes, shows that taking royal jelly 0.5-6 grams daily for 4-8 weeks does not improve markers of glycemic control such as fasting plasma glucose and glycated hemoglobin (HbA1c) (92879,92880,92881,102529).
• Physical performance. Oral royal jelly does not appear to improve physical performance in elderly nursing home residents. Details: A clinical trial in elderly nursing home residents shows that taking royal jelly 1.2 grams or 4.8 grams daily for one year does not improve hand grip strength, walking, or ability to stand on one leg when compared with placebo (95870).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Androgenic alopecia. Although there has been interest in using topical royal jelly for androgenic alopecia, there is insufficient reliable information about the clinical effects of royal jelly for this purpose.
• Atherosclerosis. Although there has been interest in using oral royal jelly for atherosclerosis, there is insufficient reliable information about the clinical effects of royal jelly for this purpose.
• Athletic performance. Oral royal jelly has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Two small clinical trials in elite male swimmers and runners show that taking royal jelly 400 mg and coenzyme Q10 60 mg daily for 10 days does not improve high-intensity interval training performance when compared with placebo (109992,109993). These studies were small and may not have been adequately powered to detect a difference between groups.
• Cancer-related fatigue. It is unclear if oral royal jelly is beneficial for improving cancer-related fatigue. Details: A small clinical study in patients with solid (nonhematologic) malignancies shows that taking 5 mL of processed honey and royal jelly twice daily for 4 weeks reduces fatigue when compared with 5 mL of honey alone (92877).
• Chemotherapy-induced acral erythema. It is unclear if oral royal jelly is beneficial for preventing acral erythema from tyrosine kinase inhibitors (TKIs). Details: One small clinical trial in patients receiving TKI therapy for renal cell carcinoma shows that taking royal jelly 900 mg four times daily for 3 months does not reduce the risk of acral erythema when compared with placebo (105773). However, this study may have been inadequately powered to detect a difference between groups.
• Chemotherapy-induced hepatotoxicity. It is unclear if oral royal jelly is beneficial for preventing hepatotoxicity from tyrosine kinase inhibitors (TKIs). Details: One small clinical trial in patients receiving TKI therapy for renal cell carcinoma shows that taking royal jelly 900 mg four times daily for 3 months does not reduce the risk of hepatotoxicity when compared with placebo (105773). However, this study may have been inadequately powered to detect a difference between groups.
• Chemotherapy-induced nephrotoxicity. It is unclear if oral royal jelly is beneficial for preventing chemotherapy-induced nephrotoxicity. Details: A small clinical study in patients receiving two cycles of cisplatin therapy shows that taking royal jelly capsules daily may attenuate increases in serum creatinine and urea levels when compared with placebo. However, it is unclear if this effect is clinically significant; the increased levels that occurred in the placebo group were still within normal limits (95871). The validity of these results is also limited by the short study duration and lack of statistical comparison between groups. Another small clinical trial in patients receiving tyrosine kinase inhibitor therapy for renal cell carcinoma shows that taking royal jelly 900 mg four times daily for 3 months does not reduce the risk of kidney dysfunction when compared with placebo (105773). However, this study may have been inadequately powered to detect a difference between groups.
• Chemotherapy-related fatigue. It is unclear if oral royal jelly is beneficial for preventing fatigue from tyrosine kinase inhibitors (TKIs). Details: One small clinical trial in patients receiving TKI therapy for renal cell carcinoma shows that taking royal jelly 900 mg four times daily for 3 months reduces the frequency of chemotherapy-related fatigue when compared with placebo (105773,105774).
• Cognitive impairment. Oral royal jelly has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical trial in elderly patients with mild cognitive impairment shows that taking a specific combination product (Memo, Pharco Pharmaceuticals), which contains natural lyophilized royal jelly 750 mg, ginkgo leaf extract 120 mg, and Panax ginseng root extract 150 mg, daily for 4 weeks improves cognitive ability when compared with placebo (89712).
• Diabetic foot ulcers. Small clinical studies suggest that topical application of royal jelly plus panthenol may improve healing of diabetic foot ulcers. It is unclear if topical royal jelly alone is beneficial for this use. Details: One small clinical study shows that applying royal jelly 5% to a wound after conventional cleansing and debriding three times weekly for 3 months does not improve the healing of diabetic foot ulcers when compared with placebo (92882). However, other small clinical studies show that applying 1-3 grams of a specific combination ointment (Pedyphar) containing royal jelly and panthenol after conventional cleansing and debriding procedures twice weekly for up to 6 months may improve the healing of diabetic foot ulcers (71980,102526). In one of these studies, the rate of complete healing of life-threatening ulcers was 2.7-fold greater with this combination ointment when compared with panthenol alone (102526). Possible reasons for these discrepancies include the use of combination versus single ingredient ointments and the duration of treatment.
• Dry eye. It is unclear if oral royal jelly is beneficial in patients with dry eye. Details: A small clinical trial in Japanese patients with dry eye shows that taking enzyme-treated royal jelly 2.4 grams daily for 8 weeks does not improve tear stability or dry eye symptoms when compared with placebo (95869).
• Fractures. Although there has been interest in using oral royal jelly for healing of fractures, there is insufficient reliable information about the clinical effects of royal jelly for this purpose.
• Hepatitis. Although there has been interest in using oral royal jelly for hepatitis, there is insufficient reliable information about the clinical effects of royal jelly for this purpose.
• Male infertility. Intravaginal application of royal jelly has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical study in couples experiencing infertility due to asthenozoospermia shows that applying a saline solution containing royal jelly 3 grams, Egyptian bee honey 100 grams, and bee bread 1 teaspoon intravaginally before or after intercourse, starting one day after menstruation and continuing for 2 weeks, can increase the rate of pregnancy when compared with intrauterine insemination (55131). It is unclear if this effect is due to royal jelly, other ingredients, or the combination.
• Obesity. It is unclear if oral royal jelly is beneficial for reducing body weight in patients who are overweight or obese. Details: One small clinical study in overweight patients with type 2 diabetes shows that taking fresh royal jelly 1 gram daily for 8 weeks reduces body weight by around 2 kg and body mass index (BMI) by around 0.7 kg/m², as well as carbohydrate and total energy intake, when compared with placebo. However, the improvement is modest and may not be clinically significant (92878). Another small clinical study in overweight adults shows that taking royal jelly 1000 mg daily for 8 weeks does not reduce body weight, BMI, or appetite when compared with placebo (102528). However, this study may have been inadequately powered to detect a difference in these outcomes.
• Oral mucositis. It is unclear if oral royal jelly is beneficial for preventing or treating oral mucositis in patients receiving radiotherapy and/or chemotherapy. Details: One small clinical trial in patients receiving chemotherapy and radiotherapy shows that swishing and swallowing royal jelly 1 gram in two divided doses daily, in addition to standard rinses with benzydamine and nystatin, improves healing time of mild or moderate oral mucositis when compared with standard rinses alone (95867).
• Osteoporosis. It is unclear if oral royal jelly is beneficial in patients with osteoporosis. Details: A small clinical trial in postmenopausal adults shows that taking royal jelly powder 1000 mg, equivalent to 3000 mg of fresh royal jelly, daily for 6 months maintains bone mineral density (BMD) in the proximal femur and lumbar spine, while patients taking placebo saw significant reductions in lumbar spine BMD. Also, markers of bone turnover were significantly reduced with placebo, while significant changes in these markers were lacking in patients taking royal jelly (105775). It is unclear whether these findings can be generalized to patients with documented osteoporosis.
• Peptic ulcers. Although there has been interest in using oral royal jelly for peptic ulcers, there is insufficient reliable information about the clinical effects of royal jelly for this purpose.
• Premenstrual syndrome (PMS). It is unclear if oral royal jelly, taken alone or in combination with other ingredients, is beneficial in patients with PMS. Details: A small clinical study in healthy college students shows that taking royal jelly 1 gram daily starting on the first day of menstruation and continuing for two consecutive menstrual cycles improves PMS symptoms when compared with placebo (95873). However, methodological flaws associated with the study limit the validity of these results. A small clinical study shows that taking a specific combination product (Femal, Natumin Pharma), providing royal jelly 12 mg, bee pollen extract 72 mg, and bee pollen plus pistil extract 240 mg, twice daily over 2 menstrual cycles seems to decrease some symptoms of PMS including irritability, weight increases, and edema (12008). It is unclear if these effects are due to royal jelly, other ingredients, or the combination.
• Renal cell carcinoma. It is unclear if oral royal jelly is beneficial in patients with renal cell carcinoma. Details: One small clinical trial in patients receiving tyrosine kinase inhibitor (TKI) therapy for renal cell carcinoma shows that taking royal jelly 900 mg four times daily for 3 months reduces tumor size, improves chemotherapy-related fatigue and anorexia, and reduces the need for dose reduction or the discontinuation of therapy when compared with placebo (105773,105774). Royal jelly does not seem to reduce other TKI-related adverse effects, including gastrointestinal symptoms, oral mucositis, acral erythema, anemia, hepatotoxicity, or nephrotoxicity, when compared with placebo (105773). However, this study may have been inadequately powered to detect a difference in these outcomes. More evidence is needed to rate royal jelly for these uses.

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POSSIBLY SAFE ...when used orally and appropriately, short-term. Royal jelly 1-4.8 grams daily for up to 1 year has been used in clinical research without reported adverse effects (95869,95870,102527,102528,105773,105774)....when used topically and appropriately for up to 6 months (71980,102526).

CHILDREN: POSSIBLY SAFE
when used orally and appropriately for up to 6 months. A specific royal jelly product (Bidro) 150 mg twice daily has been used with apparent safety for 3-6 months in children 5-16 years of age (71968).

PREGNANCY AND LACTATION:
Insufficient reliable information available; avoid using.

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ANTIHYPERTENSIVE DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, royal jelly might increase the risk of hypotension when taken with antihypertensive drugs.  Details Animal research suggests that royal jelly might lower blood pressure (71982,71963).

WARFARIN (Coumadin) Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Royal jelly might increase the risk of bleeding when taken with warfarin.  Details In one case, an 87-year-old male who was previously stabilized on warfarin developed hematuria and was found to have an INR of 7.29 after taking a royal jelly supplement for one week (14303).

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General ...Orally and topically, royal jelly seems to be well tolerated.
Most Common Adverse Effects:
Orally: Dyspnea, eczema, oral allergy syndrome, pruritus, and urticaria in people with a history of asthma or atopy.
Topically: Contact dermatitis and skin irritation.
Serious Adverse Effects (Rare):
Orally: Anaphylaxis, status asthmaticus, and death in people with a history of asthma or atopy.

Gastrointestinal ...There is one case report of hemorrhagic colitis with abdominal pain, bloody diarrhea with concomitant hemorrhagic and edematous mucosa of the sigmoid colon after ingestion of royal jelly. Symptoms resolved within 2 weeks following discontinuation of royal jelly and conservative treatment (3516).

Immunologic ...In people with a history of atopy or asthma, royal jelly taken orally appears to cause a high rate of allergic symptoms including pruritus, urticaria, eczema, eyelid and facial edema, conjunctivitis, rhinorrhea, dyspnea, oral allergy syndrome, and asthma (7314,7315,7316,10623,95872). In severe cases, royal jelly can cause status asthmaticus, anaphylaxis, and death (792,7315,7316,10623,10624,108511). Allergic symptoms are associated with IgE-mediated hypersensitivity reactions (3513,10623).
Topically, skin irritation, exacerbation of dermatitis, or contact dermatitis may occur (791).
From occupational exposure, royal jelly can cause allergic rhinoconjunctivitis and asthma (95868).

Neurologic/CNS ...There is one report of dizziness in a patient who took a combination product containing royal jelly, bee pollen extract, and a bee pollen plus pistil extract (12008).

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