Nutrition
Nutrition rests on three pillars: complex carbohydrates, quality proteins, and healthy fats. Every meal is an opportunity to optimize your biology.
Water — The invisible foundation
Your water quality is as important as what you eat. An advanced filtration system removes contaminants while preserving essential minerals.
Multi-stage filtration system
A complete filtration system integrates these five stages in cascade. Water flows through each module sequentially, with each one removing a specific category of contaminants. The accumulation of these barriers ensures optimal water quality.
- 1Carbon block filtration — Removes chlorine, VOCs (volatile organic compounds), and particles. Solid blocks are preferred over granular — they filter smaller particles.
- 2Reverse osmosis membrane — Removes heavy metals, microplastics, and pharmaceutical residues. Achieves over 85% purity.
- 3Mixed bed deionization — Laboratory-grade molecular purification (parts per billion). Eliminates impurities that reverse osmosis may miss.
- 4Remineralization (coral calcium sand) — Reintroduces 70+ natural trace minerals. Naturally alkalinizes the water.
- 5Coconut carbon fiber — Final taste refinement — makes water taste as natural as possible.
Systems available from $300 to $1,300 depending on features.
Recommendation: Test your water with a laboratory (SimpleLab or equivalent) to identify your specific contaminants.
Minimal alternative
If a complete system isn't feasible, a filter pitcher provides a first level of protection. Choose glass or stainless steel models — plastic, exposed to repeated refill cycles, can release microparticles into the water.
Example of a plastic-free filter pitcher: Waterdrop borosilicate glass with activated carbon filter. (lien)
Microplastics — Invisible pollution
Microplastics (1 µm to 5 mm) and nanoplastics (less than 1 µm) infiltrate our daily diet. Nanoplastics, due to their size, cross the intestinal and pulmonary barriers to reach the bloodstream, then organs — heart, brain, and even the placenta.
Key figures
Main exposure sources
PET (polyethylene terephthalate) degrades during repeated cap manipulation and heat exposure
Among the worst contaminants: high temperatures degrade the plastic lining directly into the food
Heat accelerates particle release into food
Cling film, trays, bags — prolonged contact with food
Avoidance strategy
- Water: prefer filtered tap water in a glass or stainless steel bottle
- Reheating: transfer food to glass or ceramic containers
- Storage: replace plastic containers with glass (Pyrex-type)
- Popcorn: prepare it in a pot or air popper
- Shopping: choose bulk products or cardboard/glass packaging
Reverse osmosis filtration systems effectively remove microplastics from tap water.
Cookware — The coating trap
Traditional non-stick pans are coated with PTFE (polytetrafluoroethylene, brand name Teflon). Their manufacturing historically involved PFAS, the 'forever chemicals' that accumulate in the body and environment.
Identified risks
Recommended alternatives
Opt for inert materials that don't release compounds into your food:
Inert, durable, versatile. Requires preheating and some fat.
Excellent heat retention, naturally non-stick once seasoned. Lasts generations.
PTFE and PFAS-free. Verify it's actual ceramic, not just a ceramic coating on aluminum.
Lightweight, heats quickly, naturally non-stick after seasoning.
If you keep your non-stick pans
- Cook at moderate temperatures (below 400°F / 200°C)
- Use wooden or silicone utensils — metal scratches the coating
- Replace any scratched or peeling pan immediately
- Never preheat an empty non-stick pan
Morning beverages — coffee, tea, and matcha
Your morning beverage is an often underestimated longevity lever. Coffee and green tea present complementary profiles, each with specific bioactive molecules.
Coffee — validated geroprotector
Coffee is one of the most concentrated sources of antioxidants in the Western diet. Meta-analyses covering millions of participants converge on significant all-cause mortality benefits.
Documented benefits
Green tea — catechin concentrate
Green tea contains EGCG (epigallocatechin gallate), the most studied catechin for its cardioprotective and geroprotective effects. EGCG activates AMPK, the cellular energy sensor that orchestrates fat metabolism and autophagy.
Documented benefits
Matcha — concentrated green tea
Matcha is the whole tea leaf ground into powder, consumed entirely. This distinguishes it from infused green tea: shading the plants before harvest increases the concentration of L-theanine, chlorophyll, and catechins.
Matcha specifics
Plastic tea bags — invisible contamination
Nylon or PET (polyethylene terephthalate) tea bags, often marketed as 'pyramid' or 'silken', release massive amounts of micro and nanoplastics during steeping.
Scientific data
Coffee vs green tea — which to choose
Both are beneficial. The choice depends on your caffeine sensitivity and goals. Coffee offers immediate stimulation; green tea provides more diffuse energy with complementary antioxidant benefits. Alternating is a valid strategy.
Extra-virgin olive oil — Mediterranean pillar
Extra-virgin olive oil (EVOO) is the common denominator of centenarian Mediterranean populations. Beyond its monounsaturated fatty acids, its polyphenols exert measurable anti-inflammatory and cardioprotective effects.
Mortality benefits
Optimal dose
Benefits are dose-dependent up to about 20-30g per day (1.5 to 2 tablespoons). The PREDIMED trial used 50g per day (4 tablespoons) and demonstrated a 30% reduction in major cardiovascular events. (lien)
The importance of polyphenols
Not all oleic acids are equal. EVOO polyphenols — oleocanthal, hydroxytyrosol, oleuropein — are responsible for much of the observed benefits.
Refined olive oil (non extra-virgin) retains the monounsaturated fatty acids but loses most of its bioactive compounds during the refining process.
Selection criteria
- 'Extra-virgin' label mandatory (first cold pressing, no chemical treatment)
- Polyphenol content displayed (minimum 250 mg/kg, ideally 400 mg/kg)
- Recent harvest date (less than 18 months)
- Packaged in dark glass or metal (protection against UV oxidation)
- Single-varietal or single-origin (traceability)
Usage guidelines
- Consume it raw to preserve polyphenols: dressings, dish finishing
- For moderate-temperature cooking (below 350°F / 180°C), EVOO remains stable
- Avoid high-temperature frying: polyphenols degrade and smoke point is reached
Alcohol — The myth of the daily glass
The 'French paradox' and the supposed health benefits of red wine represent one of the greatest public health misconceptions. Recent meta-analyses, corrected for methodological biases, are categorical: there is no level of alcohol consumption that is safe for health.
The collapse of the myth
Studies suggesting cardiovascular benefits from red wine suffered from a major bias: the 'sick quitter effect'. Former drinkers, who had stopped for health reasons, were counted as non-drinkers — skewing the comparison. When this bias is corrected, the alleged benefits disappear. (lien)
Carcinogenic classification
Alcohol is classified as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC) — the highest category, alongside asbestos, tobacco, and ionizing radiation. This classification means the causal relationship between alcohol and cancer is established beyond any scientific doubt. (lien)
Documented risks — even at low doses
- Seven types of cancer directly caused by alcohol: mouth, pharynx, larynx, esophagus, liver, colorectum, and breast (lien)
- Increased breast cancer risk from the first daily drink — dose-dependent effect with no threshold (lien)
- Half of alcohol-attributable cancers in Europe come from 'light' and 'moderate' consumption (lien)
- Increased cardiovascular mortality, even in those over 60, contrary to previous assumptions (lien)
The toxicity mechanism
Ethanol is metabolized by the liver into acetaldehyde, a directly genotoxic molecule. Acetaldehyde damages DNA, disrupts its repair, and promotes the mutations that cause cancer. This process begins with the first sip — there is no threshold dose below which DNA is spared.
Effects on longevity
- Disruption of sleep architecture: reduced REM sleep, nocturnal fragmentation, even with a single drink (lien)
- Acute inflammatory response: elevation of IL-6, TNF-α, and CRP measurable after each consumption (lien)
- Accelerated cellular aging: telomere shortening with causal effect demonstrated by Mendelian randomization (lien)
- Altered gut microbiome: dysbiosis promoting intestinal permeability ('leaky gut') (lien)
Health authority positions
The World Health Organization declared in January 2023 that no level of alcohol consumption is safe for health. New Canadian guidelines (2023) suggest that more than two drinks per week poses a significant risk. The scientific consensus is unequivocal: less is always better, and zero remains the ideal. (lien)
Red wine polyphenols (resveratrol) can be obtained from other sources — grapes, berries, supplementation — without the harmful effects of ethanol.
The 3 food pillars
Complex carbs & vegetables
Favor low glycemic index sources, rich in fiber and micronutrients. Colorful vegetables provide anti-aging polyphenols.
Quality proteins
Essential for muscle synthesis and cellular repair. Vary plant and animal sources for a complete amino acid profile.
Healthy fats
Good fats support cell membranes, brain, and hormones. Avoid trans fats and hydrogenated oils.
Gut microbiome: fibers, fermented foods, and the antibiotic scar
The gut microbiome — about 1.8 kg of microbial cells, more numerous than human cells — modulates systemic inflammation, glucose metabolism, vitamin production, and the intestinal barrier. Its diversity and stability are now recognized longevity markers.
Centenarian signature: no miracle strain
Centenarian cohort studies (Chen 2024, Bian 2017) show preserved microbial diversity, notably Akkermansia muciniphila, Bifidobacterium longum, and Bacillus subtilis. But these signatures are statistical, not causal: taking a single strain as a capsule does not reproduce the ecosystem.
Three levers proven in human clinical work
- Plant diversity. The wider the diversity of whole plant foods, the richer the microbial diversity. Practical target: 30 different plant species per week (vegetables, fruits, legumes, whole grains, nuts, seeds, herbs).
- Unpasteurized fermented foods. Artisanal kefir, raw sauerkraut, kimchi, natto, unheated miso. The Wastyk study (Cell, 2021) showed a reduction in 19 inflammatory markers after 10 weeks of daily consumption. Industrial pasteurized yogurt does not deliver the same benefit.
- GOS prebiotic. Galacto-oligosaccharides are to date the only prebiotic with documented dose-dependent bifidogenic efficacy. Preferable to probiotic capsules whose viability after gastric passage is largely uncertain.
The hidden cost of antibiotics
The SCAPIS study (Nature Medicine, 2026) on 14,979 adults documented a microbial scar lasting up to 8 years after a broad-spectrum antibiotic course — clindamycin alone removes an average of 47 species from the microbiome. Saccharomyces boulardii during the course and 15 days after limits damage (converging meta-analyses).
Omega-6 / omega-3 ratio: inflammation by default
Omega-6 and omega-3 fatty acids compete in the inflammatory cascade. The modern Western ratio, around 15:1, fuels chronic low-grade inflammation. The ancestral and optimal ratio sits between 2:1 and 4:1.
Reference metrics
- →Average Western ratio: 15:1, sometimes 20:1 in heavily processed diets
- →Optimal ratio: 2:1 to 4:1 (traditional Mediterranean diet, Inuit, Okinawa)
- →Erythrocyte omega-3 index: > 8% associated with the lowest mortality
Three concrete levers
- Reduce omega-6 rich oils. Corn, soy, sunflower, grapeseed, and most industrial oils. Prefer extra-virgin olive oil, avocado, ghee.
- Increase EPA and DHA. Small fatty fish 2 to 3 times per week (sardines, mackerel, anchovies) or EPA / DHA supplementation dosed against the erythrocyte omega-3 index.
- Measure rather than estimate. The erythrocyte omega-3 index integrates dietary intake and individual conversion (which varies by a factor of 5 to 10 between people).
Ultra-processed foods (UPF): the dose makes the poison
The NOVA classification distinguishes ultra-processed foods — industrial formulations with cosmetic additives, emulsifiers, sweeteners, and substitutes for real ingredients. Their consumption is now the dietary factor most robustly associated with all-cause mortality.
Major epidemiological data
- →BMJ (2024) meta-analysis of 9.9 million participants: +21% all-cause mortality per additional UPF serving per day
- →+50% cardiovascular events (NutriNet-Santé)
- →+62% risk of depressive syndrome (NHANES study)
Why: beyond calories
UPF disrupt satiety (pre-chewed texture), fuel inflammation (emulsifiers like carrageenan and polysorbate 80), desynchronize peripheral clocks (energy density without nutritional signal), and impoverish the microbiome (lack of complex fibers). At equal calories, a UPF meal increases food intake more than an unprocessed meal (Hall, NIH 2019).
Practical rule
If the ingredient list runs longer than 5 lines, or contains an ingredient you don't recognize as food, it's probably a UPF. Cooking from whole foods remains the most robust strategy.
Read the full analysis : Longevity diets: what epidemiological data really say
Minimize / avoid
- Refined sugar and high-fructose corn syrup — prefer Stevia or Monk Fruit as natural alternatives (lien)
- Ultra-processed foods, fried foods, processed meats
- Aspartame and artificial sweeteners — prefer natural alternatives (Stevia, Monk Fruit) (lien)Stevia and Monk Fruit have FDA GRAS status and are considered safe
- Hydrogenated oils and trans fats — increase cardiovascular risk by 23% for each 2% of energy (lien)
- Corn and soybean oil
- Alcohol (in excess)
Individual needs
Your diet should adapt to your age, activity, and health conditions:
More carbs to support growth
More protein to preserve muscle mass
Extra carbs around training
Personalized adjustments based on pathologies
Recommended protein intake
Protein needs vary by age, sex, and activity level. Seniors have increased needs to prevent sarcopenia. (lien)
| Population | Recommended intake |
|---|---|
| Sedentary adults | 0.8 g/kg/day |
| Active adults | 1.2-1.6 g/kg/day |
| Athletes / Strength training | 1.6-2.2 g/kg/day |
| Healthy seniors (65+) | 1.0-1.2 g/kg/day minimum (lien) |
| Malnourished or ill seniors | 1.2-1.5 g/kg/day (lien) |
These recommendations come from the ESPEN and PROT-AGE groups. Seniors have increased protein needs to compensate for age-related decline in protein synthesis and prevent frailty.
Macronutrient distribution
The ideal distribution depends on your activity and goals:
| Profile | Carbs | Proteins | Fats |
|---|---|---|---|
| Sedentary / Weight loss | 30-40% | 30-35% | 30-35% |
| Moderately active | 40-50% | 25-30% | 25-30% |
| Endurance athlete | 50-60% | 20-25% | 20-25% |
| Strength training | 40-50% | 30-35% | 20-25% |
About calories
Caloric needs are highly individual and depend on basal metabolism, physical activity, and body composition. Use your weight and energy levels as a guide rather than generic formulas.
Intermittent fasting
Intermittent fasting (IF) has potential longevity benefits by activating autophagy and improving insulin sensitivity. (lien)
16:8 Protocol (recommended)
8-hour eating window, 16-hour fast. Example: eat between 12pm and 8pm.
- Water
- Unsweetened tea
- Black coffee (no milk or sugar)
- Sparkling water
Potential benefits
Contraindications
- Children and growing adolescents
- Pregnant or breastfeeding women
- People with eating disorders (anorexia, bulimia)
- Diabetics on insulin (without medical supervision)
- Underweight individuals
Consult a healthcare professional before starting a fasting protocol.
Food order — mastering the glucose spike
The order in which you eat the foods in a meal directly influences your glycemic response. Eating vegetables and proteins before carbohydrates reduces the glucose spike by 30-40%. (lien)
The mechanism
This sequence stimulates GLP-1 (Glucagon-Like Peptide-1) secretion, slows gastric emptying, and improves insulin secretion. Result: carbohydrates enter the bloodstream more slowly.
The 4-step protocol
- 1Raw vegetables and salad
Start with raw fiber: green salad, raw vegetables, crudités. Fibers line the intestinal wall and create a physical barrier.
- 2Proteins and cooked vegetables
Follow with the protein source (meat, fish, eggs, legumes) accompanied by cooked vegetables.
- 3Starches
Finish the savory portion with complex carbohydrates: rice, pasta, bread, potatoes.
- 4Sweet dessert (if unavoidable)
If you're having a sweet dessert, consume it last. The already-full stomach slows sugar absorption.
Apple cider vinegar — the amplifier
One tablespoon (15 mL) of apple cider vinegar diluted in a glass of water, 10-15 minutes before a meal, enhances the glycemic reduction effect. Acetic acid inhibits starch-digesting enzymes and delays gastric emptying. (lien)
Warning: Avoid if you have gastroesophageal reflux, ulcers, or take certain medications (diuretics, insulin). Consult a healthcare professional if in doubt.
Key points
- This strategy works even without waiting between courses
- The effect is particularly pronounced in prediabetic or diabetic individuals
- Combining food order AND apple cider vinegar maximizes the glucose spike reduction