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Independent, medically-reviewed buying guides across longevity, weight, hormonal health, and the supplements that actually move biomarkers.
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Longevity & NAD

214 reviews
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GLP-1 & Weight

128 reviews
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Hair & Skin

187 reviews

Hormones

96 reviews
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Supplements

412 reviews
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Sleep & Recovery

163 reviews

This week's top buying guides

Every guide is independently tested, MD-reviewed, and cross-checked against peer-reviewed research before publication.
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Advertisement · 970×90 leaderboard Premium display inventory · Brand-safe, health-vertical specific · Direct & programmatic

NAD precursors, side-by-side

NMN, NR, and Niagen products compared on dose, bioavailability, third-party testing, and clinical evidence. The differences matter more than the marketing suggests.

Open the NAD comparison tool
Brand Type Rating $/month
Wonderfeel Yngr NMN+ ★★★★★ $78 View deal
Tru Niagen NR ★★★★☆ $52 View deal
Elysium Basis NR+pter. ★★★★☆ $60 View deal
Renue by Science NMN (subl.) ★★★★☆ $70 View deal

From our brand partners

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Every guide is reviewed by a licensed professional

Apex Vitality publishes nothing on supplements, GLP-1, or hair therapy without sign-off from our medical review board — a panel of MDs, registered dietitians, and clinical pharmacists. Compensation never influences our rankings.

Meet the medical board →
Dr. Sara Reyes, MD
Internal Medicine, Stanford-trained
Reviewed 84 guides
Dr. Marcus Patel, MD
Obesity Medicine, ABOM-certified
Reviewed 41 guides
Dr. Anna Kim, MD
Dermatology, NYU Langone
Reviewed 38 guides
James Holt, RDN
Registered Dietitian Nutritionist
Reviewed 112 guides

Latest from the editorial desk

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Research

The science behind NAD+ decline: what the 2026 longitudinal studies actually show

A look at the new wave of human trials on NMN and NR supplementation — and what the strongest evidence supports (and doesn't).

Dr. Sara Reyes, MD · 11 min read
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GLP-1

Compounded vs. brand-name semaglutide: the cost, safety, and access tradeoffs

Telehealth has created a parallel GLP-1 economy. Here's what every patient should know before choosing — and the questions to ask your prescriber.

Dr. M. Patel, MD · 8 min read
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Hair

Why your dermatologist is suddenly asking about oral minoxidil

Low-dose oral minoxidil is having a moment. The off-label evidence, the side effects, and which telehealth clinics will actually prescribe it.

Dr. A. Kim, MD · 7 min read
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Supplements

Third-party testing: how to read a COA and spot the brands faking it

An RDN-led guide to certificates of analysis, USP/NSF marks, and the specific red flags that signal a supplement isn't what the label claims.

James Holt, RDN · 6 min read