By goal
Evidence-Backed Supplements for Longevity and Healthy Aging
No supplement is proven to extend human lifespan, and the longevity field is full of bold claims resting on cell or animal data. Here we grade what the human evidence actually shows for the compounds and nutrient-dense whole foods (like nuts) studied for healthy-aging markers — from antioxidants and NAD⁺ precursors to fungi and polyphenols. The strongest levers for healthy aging remain diet, exercise, sleep and not smoking; treat everything below as educational, not anti-aging advice.
❝
Best-supported here: Almond (Moderate), Cashew (Moderate), Coenzyme Q10 (Moderate), Ginkgo Biloba (Mixed) — each graded below by the weight of human evidence.
| Supplement | Evidence for this goal | Typical dose | Key caution | Studies |
|---|---|---|---|---|
| Almond | Moderate | 1 oz (~28 g) per day, a small handful (about 23 almonds); cardiometabol… | Almonds are a tree nut and a common food allergen; in sensitized individuals they can trigg… | 10 |
| Cashew | Moderate | About 1 oz (~28-30 g) per day, a small handful (roughly 16-18 kernels) | Cashews are a tree nut and can cause IgE-mediated allergy, including severe, potentially fa… | 10 |
| Coenzyme Q10 | Moderate | 100–300 mg/day with fat for absorption. | Very safe. | 19 |
| Ginkgo Biloba | Moderate for this goal | 120–240 mg/day standardized extract (EGb 761). | Generally safe. | 17 |
| Hazelnut | Moderate | About 1 oz (28-30 g) per day, a small handful (~20 nuts); trials used 2… | Hazelnuts are a tree nut and a common cause of food allergy; in sensitized people they can… | 8 |
| Lutein & Zeaxanthin | Moderate | 10 mg lutein + 2 mg zeaxanthin daily (the AREDS2 dose); MPOD studies su… | Generally recognized as safe at typical supplemental doses (up to ~20 mg/day lutein); the A… | 19 |
| Peanut | Moderate | About 1 oz (28 g) per day, a small handful, unsalted | Peanut allergy is one of the most common and severe food allergies and can cause life-threa… | 9 |
| Pecan | Moderate | About 1-2 oz (28-57 g) per day, a small-to-large handful, replacing oth… | Pecans are tree nuts and can trigger IgE-mediated allergy, including life-threatening anaph… | 7 |
| Pistachio | Moderate | 1-2 oz (~28-56 g, a small-to-medium handful) of unsalted pistachios per… | Pistachios are a tree nut and can cause IgE-mediated allergic reactions including life-thre… | 10 |
| Walnut | Moderate | 1 oz (~28 g) per day, a small handful (about 14 halves) | Tree-nut allergy is common and can cause life-threatening anaphylaxis; walnuts are a major… | 10 |
| Astaxanthin | Preliminary | 4–12 mg/day (most trials used 4–6 mg/day). | Generally well tolerated at 4–12 mg/day. | 20 |
| Brazil Nut | Preliminary | 1-2 nuts (~5-10 g) per day; even a single nut supplies ~70-90 mcg selen… | Tree nuts are a major allergen and can cause life-threatening anaphylaxis; avoid if allergi… | 10 |
| Chestnut | Preliminary | About 1 oz (~28 g), roughly 3-4 roasted chestnuts, as part of a varied… | Chestnuts can trigger tree-nut allergy, including potentially life-threatening anaphylaxis;… | 9 |
| Edible Bird's Nest | Preliminary | Traditionally simmered as a tonic (a few grams); no established therape… | Can trigger serious allergic reactions in sensitive people. | 17 |
| Glutathione (Skin Whitening) | Preliminary for this goal | Studied oral doses ~250–500 mg/day for 4–12 weeks; IV/injectable is the… | Oral glutathione at studied doses appears well tolerated short-term, but long-term cosmetic… | 18 |
| Glycine | Preliminary | 3 g before bed for sleep. | Very safe. | 16 |
| Goji Berry | Preliminary | 15–45 g dried berries/day, or equivalent juice/extract. | Safe as a food. | 18 |
| Macadamia | Preliminary | About 1 oz (28-43 g) per day, a small handful (~10-15 kernels) | Tree nuts including macadamia can trigger IgE-mediated allergy and, in sensitized individua… | 8 |
| Nicotinamide Riboside (NR) | Preliminary | 250–1000 mg/day orally (trials have used up to 2000–3000 mg/day); commo… | Generally well tolerated; most common adverse effects are mild headache, flushing or feelin… | 16 |
| NMN (Nicotinamide Mononucleotide) | Preliminary | 250–600 mg once daily by mouth; trials have used up to 900 mg/day. Bloo… | Short-term oral NMN (up to 900 mg/day for 1-3 months) was well tolerated in trials, with no… | 12 |
| Pine Nut | Preliminary | 1 oz (~28 g) per day, a small handful; appetite studies used ~2-3 g pin… | Pine nuts are tree nuts and can trigger IgE-mediated allergy including anaphylaxis; people… | 10 |
| Reishi | Preliminary | 1.5–9 g/day of extract (standardized to polysaccharides/triterpenes). | Generally safe for a few months. | 17 |
| Royal Jelly | Preliminary | Commonly 300–1,000 mg/day in studies. | ⚠ Can cause severe allergic reactions — asthma attacks and anaphylaxis — especially in peop… | 15 |
| Schisandra | Preliminary | 1–3 g dried berries or ~500 mg standardized extract/day. | Generally well tolerated. | 14 |
| Shilajit | Preliminary | 250–500 mg/day of a PURIFIED, lab-tested extract. Never use raw shilaji… | ⚠ Unpurified shilajit can contain dangerous heavy metals (lead, arsenic). | 16 |
| Taurine | Preliminary | 1-3 g per day orally; cardiometabolic and obesity trials used 0.5-6 g/d… | Taurine is generally recognized as safe and well tolerated at doses up to ~3 g/day, with th… | 16 |
| Turkey Tail (PSK/PSP) | Preliminary for this goal | PSK 3 g/day or PSP ~1–3 g/day, typically as an adjuvant to conventional… | Generally well tolerated; the most common side effects are mild gastrointestinal upset, nau… | 13 |
| Urolithin A | Preliminary | 500–1000 mg once daily of standardized urolithin A (e.g., Mitopure), ta… | Urolithin A has a favorable short-term safety profile in trials up to about 4 months at 250… | 10 |
| Green Tea Extract (EGCG) | Mixed | Commonly 250-500 mg/day of standardized extract providing roughly 100-3… | Concentrated green tea EXTRACTS (unlike ordinary brewed tea) carry a rare but documented ri… | 19 |
| Lion's Mane | Mixed for this goal | 500–3,000 mg/day of fruiting-body extract. | Well tolerated in trials. | 13 |
| He Shou Wu (Fo-Ti) | No Evidence for this goal | Traditionally used as prepared (processed) root in formulas; raw root i… | ⚠ Significant risk of liver injury (acute hepatitis), including with 'natural' products. | 17 |
| Resveratrol | No Evidence for this goal | Commonly 150–500 mg/day of trans-resveratrol; research doses range up t… | Generally well tolerated up to about 1,000 mg/day; higher doses (>=1,000–2,000 mg/day) freq… | 23 |