Nuts (Overview)
An overview page. For specific nuts, see: walnuts, almonds, brazil nuts.
Five servings per week cuts heart attack risk by 40–60% -- and the PREDIMED trial confirmed that 30 g mixed nuts daily reduced cardiovascular events by 28%.
Why It Matters for Longevity
The epidemiological evidence for nuts is among the strongest in nutrition. A dose-response meta-analysis of 29 prospective studies found that 28 g/day nut consumption was associated with 22% lower all-cause mortality, 21% lower cardiovascular mortality, and 15% lower cancer mortality — with a significant dose-response across all endpoints (Aune et al., 2016, BMC Med).
The PREDIMED trial — a landmark RCT of 7,447 participants — confirmed that a Mediterranean diet supplemented with 30 g mixed nuts per day reduced major cardiovascular events by 28% compared with a control diet over a median of 4.8 years, establishing nuts as an evidence-based cardiovascular protective food (Estruch et al., 2018, N Engl J Med).
Each nut type contributes differently: walnuts provide ALA omega-3, almonds deliver vitamin E and oleic acid, hazelnuts and pine nuts contribute plant sterols that block cholesterol absorption. Together with soy, oats, and psyllium, nuts were part of a Canadian cholesterol-lowering portfolio achieving 13% LDL reduction.
How to Use It
5 servings per week (~30 g per serving). Raw or lightly toasted. Mix varieties for diverse nutrient profiles. Store in fridge or freezer to prevent rancidity.
What to Pair It With
| Ingredient | Why | Tradition |
|---|---|---|
| Dried fruits | Fat + fibre moderate glycemic response | Mediterranean |
| Extra-virgin olive oil | Complementary unsaturated fats; PREDIMED synergy | Mediterranean |
| Dark chocolate | Combined polyphenols for cardiovascular benefit | European |
| Oats / whole grains | Cholesterol-lowering food portfolio | Global |
| Honey | Traditional sweetener pairing | Middle Eastern |
The Science
- Aune et al., 2016, BMC Med: Dose-response meta-analysis of 29 prospective studies -- 28 g/day nut consumption associated with 22% lower all-cause mortality, 21% lower CVD mortality, 15% lower cancer mortality.
- Estruch et al., 2018, N Engl J Med: PREDIMED trial -- Mediterranean diet supplemented with 30 g mixed nuts/day reduced major cardiovascular events by 28% versus control over 4.8 years.
References
- Aune D, Keum N, Giovannucci E, et al. Nut consumption and risk of cardiovascular disease, total cancer, all-cause and cause-specific mortality: a systematic review and dose-response meta-analysis of prospective studies. BMC Med. 2016;14(1):207. PMID: 27916000. doi:10.1186/s12916-016-0730-3
- Estruch R, Ros E, Salas-Salvadó J, et al. Primary prevention of cardiovascular disease with a Mediterranean diet supplemented with extra-virgin olive oil or nuts. N Engl J Med. 2018;378(25):e34. PMID: 29897866. doi:10.1056/NEJMoa1800389
Key Nutrients
| Nutrient | Per 100g | Notes |
|---|---|---|
| Unsaturated fats | 40–65 g | Walnuts: ALA omega-3; almonds: oleic acid; all reduce LDL |
| Plant sterols | 72–220 mg | Block cholesterol absorption; pistachios, almonds richest |
| Vitamin E + polyphenols | varies by type | Diverse antioxidant profiles across nut varieties |