✓ No active regulatory warningsFDA MedWatch, EMA EudraVigilance, WHO VigiBase, WADA Prohibited List · 2026-05-29
📰Read the full Eggshell Membrane evidence review on GMJ News →Complete clinical article, references and updates on news.gmj.ge. This page is the structured safety summary.⚠ Egg-allergic patient considering eggshell membrane — contraindicated [1]
⚠ Patient expecting structural cartilage repair from ESM — mechanism is immunomodulatory (anti-inflammatory) [1]
⚠ Patient failing glucosamine/chondroitin — ESM has different mechanism; worth trying [1]
⚠ Patient taking generic ESM expecting NEM® results — composition may differ [1]
🥗 Food first — build your daily Typical 500 mg
Check the foods you regularly eat — the bar fills toward your daily target.
Egg membrane (from 1 egg, if peeled off)50 mg ESM (approximate, if manually extracted)
Check your regular foods above
🔬 Lab interpreter
ℹ️ No validated blood test. There is no established laboratory test to assess status or guide dosing for this ingredient. Clinical response and symptoms are the practical guide.
⚕ For professionals — confirm ranges against your local laboratory.
Clinical verdict
Eggshell membrane (NEM® 500 mg/day) is a single-capsule joint supplement with rapid onset (7–10 days) via immunomodulatory mechanism — much faster and simpler than glucosamine/chondroitin. Evidence is moderate (2 RCTs) but consistent. The critical safety point: egg-allergic patients must avoid. No head-to-head comparison with glucosamine exists [1].
1 How much do I need?
👤 Adults: Specific dosage data under clinical review
👴 Elderly: Specific dosage data under clinical review
🤰 Pregnancy: See guidance
Food-derived, no specific concerns. Avoid in egg allergy [1].
👦 Pediatric: See guidance
Not studied in children. No established pediatric indications [1].
🏃 Athletes: Standard dose
⚖️ Obesity: Standard dose
Fat-soluble compounds may require dose adjustment in obesity.
🩺 Renal: Consult specialist
Dose adjustment may be needed in renal impairment.
🌱 Vegan: Standard dose
How to take
🍽 Timing: Once daily, with or without food [1].
💊 With food: No specific requirement [1].
🚫 Avoid: In egg-allergic patients. Generic products without quality verification [1].
2 Which form?
| Form | Bioavailability | Vegan | Cost |
|---|---|---|---|
| ['NEM® (500 mg capsules)', 'preferred', 'Standardized, clinically studied. 500 mg once daily [1].'] | Standard | Check label | |
| ['Generic eggshell membrane powder', 'variable', 'Non-standardized. Composition may differ from NEM® [1].'] | Standard | Check label | |
| ['ESM in joint formulas (combination products)', 'common', 'Often combined with other joint ingredients. Verify ESM dose [1].'] | Standard | Check label |
3 Common questions
How does eggshell membrane work? ▼
The mechanism appears to be immunomodulatory rather than structural. ESM likely modulates NF-κB and reduces pro-inflammatory cytokines (IL-2, TNF-α) in the joint. The rapid onset (7–10 days vs 8–12 weeks for glucosamine) supports an anti-inflammatory rather than cartilage-rebuilding mechanism [1].
Is one capsule really enough? ▼
Yes. NEM® 500 mg/day is the studied dose. Unlike glucosamine (1,500 mg) + chondroitin (1,200 mg) requiring multiple pills, ESM's mechanism works at much lower doses. This is a significant compliance advantage [1].
Can I use it if I'm allergic to eggs? ▼
Use with extreme caution or avoid. ESM contains egg proteins that could trigger allergic reactions in egg-sensitized individuals. If you have a confirmed egg allergy, eggshell membrane supplements are not appropriate [1].
How does NEM® compare to glucosamine? ▼
No head-to-head RCTs exist. NEM® has faster onset (7–10 days vs 8–12 weeks) and simpler dosing (1 capsule vs multiple). Glucosamine has more extensive evidence (larger RCTs, Cochrane review). The mechanisms differ: NEM® appears immunomodulatory, glucosamine is structural. They could theoretically be combined [1].
4 Clinical evidence
Strong
No Cochrane review for ESM [1]. HIGH
Moderate
Knee OA: an RCT (n=67) of NEM® 500 mg/day showed significant improvement in joint pain (−26.6%) and stiffness (−27.8%) vs placebo at day 10 and sustained through day 60 [1]. Exercise-induced joint pain: NEM® 500 mg/day reduced post-exercise joint pain and stiffness at 7 days in an RCT of healthy volunteers [1]. Inflammatory biomarkers: NEM® reduced IL-2 and TNF-α in open-label studies [1]. MODERATE
Insufficient
5 Safety, toxicity & adverse events
Absolute contraindications
✕ Egg allergy
Relative
⚠ Generally well tolerated; limited interaction data
⚠ Pregnancy and lactation — limited data
🚩 Red flags
● Egg-allergic patient using ESM — allergic reaction risk [1]
● Patient substituting ESM for medical OA management (physiotherapy, weight management) — it's adjunctive [1]
6 Interactions
Drug interactions
No known drug interactions None
Mechanism: Food-derived product [1].
Effect: None [1].
Action: Safe with all medications [1].
Supplement synergies
Glucosamine + Chondroitin · 500 mg NEM® + standard G/C
Different mechanisms: ESM (immunomodulatory) + G/C (structural). May provide comprehensive joint support [1].
Different mechanisms: ESM (immunomodulatory) + G/C (structural). May provide comprehensive joint support [1].
UC-II Collagen · 500 mg NEM® + 40 mg UC-II
Both immunomodulatory but different targets. Could theoretically combine [1].
Both immunomodulatory but different targets. Could theoretically combine [1].
7 Regulatory
United States (FDA): NEM® has GRAS status. Available as dietary supplement [1].
European Union: Available as food supplement [1].
Global: Available in most markets as OTC joint health supplement [1].
8 US supplement products
2
on-market products containing Eggshell Membrane (NIH DSLD)
Brands carrying Eggshell Membrane (1)
Click a brand to see its Eggshell Membrane products.
9 References (3)
[1]Ruff KJ, et al. Eggshell membrane: a possible new natural therapeutic for joint and connective tissue disorders. Results from two open-label human clinical studies. Clin Interv Aging. 2009;4:235-240. doi:10.2147/CIA.S5797 REVIEW Accessed: 2026-05-29
[2]Ruff KJ, et al. Eggshell membrane in the treatment of pain and stiffness from osteoarthritis of the knee: a randomized, multicenter, double-blind, placebo-controlled clinical study. Clin Rheumatol. 2009;28(8):907-914. doi:10.1007/s10067-009-1173-4 RCT Accessed: 2026-05-29
[3]Brunello E, Masini A. NEM® brand eggshell membrane effective in the treatment of pain and stiffness associated with osteoarthritis of the knee in an Italian study population. Int J Clin Med. 2016;7:169-175. doi:10.4236/ijcm.2016.72018 REVIEW Accessed: 2026-05-29
10 Cite this page
Vancouver: Pkhakadze G. Eggshell Membrane — safety profile [Internet]. Tbilisi: PHIG; 2026 [cited 2026 Jun 24]. Available from: https://supplement.ge/ingredients/egg/
APA 7th: Pkhakadze, G. (2026). Eggshell Membrane — Safety profile. Public Health Institute of Georgia. https://supplement.ge/ingredients/egg/
📋 Editorial information
Author: Prof. G. Pkhakadze, MD, MPH, PhD
Institution: Public Health Institute of Georgia (PHIG)
Affiliation: David Tvildiani Medical University (DTMU)
First published: January 2026
Last reviewed: 2026-05-29
Next review: December 2026
References: 3 cited sources
COI: SupplementIndex receives no funding from supplement manufacturers. All content independently authored by PHIG.
Process: Systematic literature review
📄 License & reuse
Published under Creative Commons Attribution 4.0 International (CC BY 4.0). You may share and adapt for any purpose with attribution.
Pkhakadze G. "Eggshell Membrane — Safety Profile." SupplementIndex, PHIG, 2026. https://supplement.ge/ingredients/egg/ CC BY 4.0.
GP
Prof. G. Pkhakadze, MD, MPH, PhD
Professor of Public Health · Head of Department, DTMU
Editor-in-Chief, Georgian Medical Journal (ISSN 3088-4322)
Chair, Public Health Institute of Georgia · UEMS Public Health Section
Educational and public health purposes. CC BY 4.0. Consult your healthcare provider before starting any supplement. Corrections: info@accreditation.ge. Publisher: PHIG