Supplements That
Actually Work
Evidence-based supplementation protocols for longevity and performance.
Science-backed protocols for supplements optimization.
The supplement aisle is overwhelming. Most products don't work. Here's what does.
About Supplements
The global dietary supplement market reached $177 billion in 2025, yet the vast majority of products lack meaningful clinical evidence [1]. The gap between marketing claims and scientific reality makes independent evaluation critical. At BetterVitals, we focus exclusively on supplements with peer-reviewed support, transparent ingredient sourcing, and third-party testing verification.
A few supplements stand out with robust clinical evidence. Vitamin D deficiency affects an estimated 42% of U.S. adults, with supplementation linked to improved immune function, bone health, and mood regulation in deficient populations. Omega-3 fatty acids (EPA/DHA) have over 4,000 clinical studies supporting cardiovascular, cognitive, and anti-inflammatory benefits. Magnesium — deficient in approximately 50% of Americans — plays a role in over 300 enzymatic reactions and has strong evidence for sleep quality and stress resilience [2].
The longevity supplement space has attracted significant attention with compounds like NMN (nicotinamide mononucleotide), resveratrol, and spermidine. While animal studies show promising effects on NAD+ levels and cellular aging markers, human clinical data remains limited. A 2023 review in Nature Aging noted that NMN supplementation increased blood NAD+ levels by 38-50% in humans, but long-term healthspan outcomes require further study [3].
When evaluating supplements, prioritize third-party testing (NSF, USP, ConsumerLab), bioavailable forms (e.g., magnesium glycinate over oxide, methylfolate over folic acid), and evidence-based dosing. The most expensive product is rarely the best — transparency about ingredient sourcing and testing matters more than branding.
"Most people would benefit more from optimizing sleep, exercise, and nutrition before adding supplements. But for the foundational few — D, omega-3, magnesium — the evidence is hard to ignore."
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Recommended Products
Nordic Naturals Ultimate Omega
$Premium fish oil
Thorne Basic Nutrients
$Physician-trusted multivitamin
AG1 (Athletic Greens)
$$75-ingredient daily formula
Momentous Huberman Stack
$$Huberman Lab formulations
NOVOS Core
$$A 12-ingredient longevity formula targeting multiple hallmarks of aging in one drink mix. Developed with input from Harvard and MIT longevity scientists. Third-party tested, transparent dosing.
Timeline Mitopure
$$Pure urolithin A (500mg) — a mitophagy activator with the strongest clinical evidence in the longevity supplement space. Clinically shown to improve muscle strength and endurance in humans.
Wonderfeel Youngr NMN
$$High-dose NMN supplement
Tru Niagen
$$The most-studied nicotinamide riboside (NR) supplement. 300mg patented Niagen per serving, backed by 30+ human clinical trials and shown to reliably raise blood NAD+ by 40–50%.
Thorne NiaCel 400
$$Nicotinamide riboside
NOVOS Boost
$$High-purity (>99%) nicotinamide mononucleotide (NMN) at 1,000mg per serving. Third-party tested for purity, designed to stack with NOVOS Core as a dedicated NAD+ precursor.
NOVOS Vital
$$A targeted formula focused on skin, hair, and cellular health with pterostilbene, hyaluronic acid, and antioxidants. Positioned as a complement to NOVOS Core for beauty-from-within support.
spermidineLIFE
$$Wheat-germ-derived spermidine — a natural autophagy inducer linked in population studies to longer lifespan. The most-studied spermidine supplement brand, used in registered clinical trials.
GenuinePurity NR
$A lower-cost nicotinamide riboside (NR) option for raising NAD+. Delivers the same active molecule as premium NR brands at a more accessible price, without the patented Niagen branding.
GenuinePurity Trans-Resveratrol
$Liposomal trans-resveratrol for enhanced absorption. An affordable entry point for the classic sirtuin-activating longevity compound — though the human evidence for resveratrol remains mixed.
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