Inside the Biohacker Stack: 9 Supplements With Real Clinical Evidence

The supplement industry is full of noise. Here is the signal: 9 supplements where the human clinical evidence is strong enough to justify inclusion in a serious longevity protocol, with evidence tier ratings for each.

Evidence Tier Framework

Tier 1 (Strong): Multiple human RCTs with consistent positive outcomes.
Tier 2 (Moderate): 1-2 human studies or strong animal data with clear human mechanism.
Tier 3 (Emerging): Preclinical or epidemiological data; biologically plausible.

The 9 Supplements

1. Creatine Monohydrate - Tier 1

Over 700 published studies. Improves physical performance, cognitive function (processing speed, working memory), and may have neuroprotective effects. The dose-response is linear up to 5g/day for most people. Cost: approximately $0.15/day for Creapure-grade creatine. There is essentially no reason not to take it.

2. Omega-3 (EPA+DHA) - Tier 1

Reduces systemic inflammation (CRP), improves cardiovascular markers, supports brain health (DHA is the primary structural fat in neurons), and may reduce cognitive decline risk. PREDIMED study: Mediterranean diet with olive oil and nuts (omega-3 rich) associated with 30% reduction in cardiovascular events. Dose: 2g EPA+DHA daily in triglyceride form.

3. Vitamin D3 - Tier 1

Technically a hormone precursor, not a vitamin. Receptors in virtually every tissue type. Deficiency (below 30 ng/mL) is associated with increased all-cause mortality, cancer risk, immune dysfunction, depression, and cognitive decline. 70%+ of Americans are deficient. 5,000 IU D3 + K2 is the standard protocol. Test and titrate.

4. Magnesium Glycinate - Tier 1

Involved in over 300 enzymatic reactions. Deficiency is epidemic in stressed populations - cortisol drives urinary magnesium excretion, creating a stress-depletion cycle. Magnesium supplementation improves sleep quality, reduces anxiety, and lowers blood pressure. Glycinate form has superior bioavailability and the lowest GI side effect profile.

5. NR (Nicotinamide Riboside) - Tier 1

The NAD+ precursor with the strongest human evidence. Raises blood NAD+ 40-60% at 300mg/day. Multiple independent RCTs. Activates sirtuins (longevity-associated deacetylases) and supports PARP-mediated DNA repair. Best brand: Tru Niagen (ChromaDex Niagen). Cost: $50/month.

6. Ashwagandha KSM-66 - Tier 2

Chandrasekhar et al. 2012 (Indian Journal of Psychological Medicine): 600mg KSM-66 reduced cortisol by 27.9% and perceived stress by 44% in an RCT. Also demonstrated improvements in testosterone in men and sexual function. Multiple follow-up studies corroborate. KSM-66 is the most studied ashwagandha extract - do not substitute generic ashwagandha root.

7. Lion's Mane Mushroom - Tier 2

Contains hericenones and erinacines, which stimulate Nerve Growth Factor (NGF) synthesis. Two small human RCTs (Mori et al. 2009, 2019) show cognitive improvement in older adults with mild cognitive impairment. Emerging evidence for neurogenesis support. Standard dose: 500-1000mg standardized extract. Most promising nootropic in the mushroom space.

8. CoQ10/Ubiquinol - Tier 2

Endogenous CoQ10 declines approximately 50% by age 40-50. Essential for mitochondrial electron transport chain (Complex I-III). Important for anyone taking statins (which deplete CoQ10). Ubiquinol form is pre-reduced and better absorbed. Dose: 100-200mg with fat. Evidence for heart failure is strong (Tier 1); for general longevity, Tier 2.

9. Resveratrol/Pterostilbene - Tier 2/3

Sirtuin (SIRT1) activators. Trans-resveratrol has poor bioavailability (1% oral absorption); pterostilbene is methylated with 80%+ bioavailability and longer half-life. David Sinclair's protocols use both. Human data is limited but mechanistic basis is strong - NAD+-dependent sirtuin activation is central to caloric restriction mimicry. Elysium Basis combines NR + pterostilbene as a principled stack.

What Did Not Make the Cut

Collagen peptides (no longevity evidence, reasonable for joints/skin), most herbal adaptogens beyond ashwagandha (insufficient human data), most nootropics (racetams, ALCAR at typical doses - mixed evidence), and most gut supplements beyond specific strains with clinical evidence (Akkermansia from Pendulum is interesting but expensive).

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