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Head-to-head evidence comparison — which supplement is right for you?
Nicotinamide wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
3 of 4 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
2 of 3 studies with measurable effects showed benefit.
Top outcomes
500-1500mg extract daily (standardized to guggulsterones)
With meals, Divided into 2-3 doses
Standardized extract (2.5-10% guggulsterones)
500mg twice daily
Morning and evening with meals
Niacinamide tablets (500mg)
4-8 weeks
8-12 weeks
4-8 weeks
First few weeks
3-12 months
8 weeks
Days
First days
Current stage of preclinical and clinical development of guggulsterone in cancers: Challenges and promises
Cell biology international (2024) · Systematic review
The review synthesizes evidence from diverse studies, underscoring the multifaceted biological activities of GS in cancer prevention and treatment.
A Systematic Review and Meta-Analysis of Ayurvedic Herbal Preparations for Hypercholesterolemia
Medicina (Kaunas, Lithuania) (2021) · Meta analysis · n=1386
Meta-analysis of the trials showed that guggulu reduced total cholesterol and low-density lipoprotein levels by 16.78 mg/dL (95% C.I. 13.96 to 2.61; p-value = 0.02) and 18.78 mg/dL (95% C.I. 34.07 to 3.48; p = 0.02), respectively.
Pharmacological properties of guggulsterones, the major active components of gum guggul
Phytotherapy research : PTR (2012) · Systematic review
Its active constituents, the Z- and E-guggulsterones, have been demonstrated to exhibit their biological activities by binding to nuclear receptors and modulating the expression of proteins involved in carcinogenic activities.
A Phase 3 Randomized Trial of Nicotinamide for Skin-Cancer Chemoprevention.
The New England journal of medicine (2015) · Rct · n=386
ONTRAC: phase-3, double-blind RCT randomizing 386 patients with ≥2 prior non-melanoma skin cancers to 500 mg nicotinamide twice daily or placebo for 12 months
Skin Cancer Prevention and Antiaging: Role of Nicotinamide.
International journal of molecular sciences (2026) · Review
Review of the biological rationale and clinical evidence for nicotinamide and NAD+ precursors in photoaging and cutaneous carcinogenesis
Topical nicotinamide compared with clindamycin gel in the treatment of inflammatory acne vulgaris.
International journal of dermatology (1995) · Rct · n=76
Double-blind RCT of 76 patients randomized to 4% nicotinamide gel or 1% clindamycin gel twice daily for 8 weeks for moderate inflammatory acne
Based on meta-analysis showing modest reductions in total cholesterol (16.78 mg/dL) and LDL (18.78 mg/dL). Effects require standardized guggulsterone extract. Individual response varies significantly.
The ONTRAC RCT used 500 mg twice daily (1000 mg/day total) and reduced new non-melanoma skin cancers by 23%. Effect requires continuous use; it disappeared after discontinuation. Curve is indicative — only the 1000 mg/day regimen is directly RCT-supported.
AI-estimated from published studies. Interpret as directional guidance.
Nicotinamide has a higher evidence score (5.5/10 vs 4/10) and wins in 2 of 3 categories.
For improve skin health, Guggul has a higher relevance score (78 vs 68).
No known interactions between Guggul and Nicotinamide have been documented in our database. However, always consult a healthcare provider before combining supplements.