The Complete Longevity Supplement Stack: What 3 Doctors Actually Recommend

The longevity supplement space is overwhelming. New compounds emerge monthly, each promising to extend lifespan or improve healthspan. But what do the doctors who study this field actually take?

We used Taffy to analyze 150 recent videos from three leading voices in longevity medicine: Andrew Huberman, Peter Attia, and Mark Hyman. We extracted every supplement mention, noting dosages, timing, and caveats.

The surprising finding: Despite different backgrounds (neuroscience, longevity medicine, functional medicine), they agree on more than they disagree. The foundational supplements are the same. The experimental ones are where opinions diverge.

What the doctors say

Omega-3 fatty acids are the most universally recommended longevity supplement, mentioned 43 times across all three doctors we analyzed. Huberman emphasizes EPA and DHA from marine sources as crucial for brain and body health, often recommending 1-3g of EPA specifically for mood and cognitive benefits.

Attia discusses omega-3s in the context of cardiovascular health and inflammation. He's analyzed the research on omega-3 fatty acids extensively, noting that while the seed oil debate continues, marine-sourced omega-3s have consistent positive data.

Hyman highlights omega-3s as a "buffer against inflammation." In discussing depression research, he notes that EPA supplementation can prevent depressive symptoms triggered by inflammatory states.

All three doctors agree that omega-3s are foundational. The debate is mostly about optimal dosing and EPA vs. DHA ratios for specific goals.

What the doctors say

Vitamin D3 functions as a steroid hormone that regulates hundreds of genes, and up to 70% of Americans have insufficient levels. Huberman presents it as a hormone that regulates a significant portion of the human genome, emphasizing the role of sunlight in natural production while noting most people are deficient.

Hyman cites alarming statistics: 70% of Americans have insufficient Vitamin D levels. He recommends 4000 IU daily as a foundational supplement, noting its critical role in immune function, bone health, and metabolic processes.

Sunlight is ideal, but geographic location, skin tone, and lifestyle factors mean many people need supplementation. Testing is key, as too much vitamin D can also cause problems.

What the doctors say

The form of magnesium you choose matters as much as taking it at all, since different forms serve different purposes. Huberman is particularly detailed on magnesium forms, recommending Magnesium L-threonate specifically for cognitive function and neuroplasticity, as it crosses the blood-brain barrier effectively. For sleep, he mentions magnesium glycinate or threonate taken 30-60 minutes before bed (see our sleep optimization guide for the full bedtime protocol).

Hyman identifies magnesium as often lacking in the US population. He notes it's vital for ATP production (energy), DNA repair, and hundreds of enzymatic reactions. He recommends it as a foundational supplement alongside Vitamin D and Omega-3s.

Magnesium deficiency is common due to soil depletion and processed food consumption. Most people benefit from supplementation, especially those with poor sleep or high stress.

What the doctors say

Creatine delivers significant cognitive and longevity benefits beyond its well-known muscle-building effects. Huberman discusses creatine not just for exercise performance but for brain health, noting phosphatidylserine and creatine as vital compounds for cognitive function.

Attia explores creatine benefits beyond exercise performance. He notes emerging research on cognitive benefits, particularly for aging populations, and considers it one of the most well-studied supplements available.

Hyman recommends creatine alongside resistance training as practical advice for muscle health and longevity, particularly for those over 40.

Creatine is one of the most researched supplements with an excellent safety profile. The cognitive benefits are particularly relevant for longevity.

What the doctors say

NAD+ precursors like NMN show promise for cellular repair and energy, but the human evidence is still emerging and cost-benefit analysis matters. Huberman discusses NMN as a precursor to NAD+, which supports sirtuin activity (longevity genes), noting that NAD+ levels decline with age, and NMN supplementation may help maintain cellular energy and repair mechanisms.

Attia takes a more measured approach, discussing NAD's essential role in metabolic reactions and DNA repair. He notes the observed decline with age but emphasizes that human clinical data is still emerging. He also points out that exercise -- particularly Zone 2 training -- naturally boosts NAD+ levels.

Hyman includes NAD+ optimization as part of a multi-faceted approach to mitochondrial health, alongside diet, exercise, and sleep.

What the doctors say

Fermented foods are more effective than probiotic supplements for improving microbiome diversity, according to Stanford research cited by Huberman. Huberman emphasizes fermented foods over probiotic supplements, noting that fermented foods (not fiber alone) most effectively reduced inflammation markers. He notes the probiotic supplement market is "largely unregulated."

Attia discusses fiber categories (soluble and insoluble) and their distinct roles. Insoluble fiber acts as roughage while soluble fiber feeds beneficial bacteria. He takes a measured view on probiotic supplements.

Hyman frequently discusses gut health as foundational to overall health, including its connection to brain function through BDNF (Brain-Derived Neurotrophic Factor).

CoQ10 supports the electron transport chain essential for cellular energy production, making it particularly important for mitochondrial health and aging. Hyman discusses CoQ10 as part of mitochondrial health optimization, noting that signs of mitochondrial issues include fatigue, lack of energy, and slower recovery from exercise.

Mitochondrial health is increasingly recognized as central to aging. CoQ10 supports the electron transport chain, essential for cellular energy production.

What the doctors say

Rapamycin and metformin are prescription drugs with strong animal longevity data, but they require physician supervision and carry significant side effects. Attia has discussed rapamycin extensively in longevity research contexts, exploring how drugs like rapamycin and metformin might have additive benefits. He suggests that while drugs like rapamycin affect overlapping pathways, combinations may still provide incremental benefits.

Huberman mentions rapamycin (sirolimus) in the context of specific medical cases, noting its origins as an immunosuppressant now being studied for broader longevity applications.