Eating for Longevity
David Sinclair's eating approach for longevity: eat less often, lean plant-forward, cut sugar, and let mild hunger switch on the body's repair pathways. Principles, not a rigid diet.
In Lifespan and his interviews, Sinclair frames eating less and less often as one of the most reliable levers we have on aging. He personally runs a time-restricted window (often skipping breakfast and lunch), eats plant-forward, and avoids sugar. The mechanisms he points to are real biology; the strictness is his own. We've kept this principles-based and deliberately avoided calorie targets.
Why it works▼
Eat in a compressed window
Sinclair often skips breakfast (and lunch), eating later in the day. 'Being a little bit hungry is a good thing.' Start gently: skip just one meal, or push your first meal later.
Black coffee or tea while fasting
Black coffee doesn't meaningfully break a fast and carries its own polyphenols. It's his go-to to bridge the morning.
Eat plant-forward, less meat
A plant-heavy plate keeps mTOR lower, and colourful produce is rich in polyphenols. He cooks with olive oil (a sirtuin activator) and eats less meat than he used to.
Cut sugar and refined carbs
He treats sugar and refined carbs as accelerants of aging through glycation and insulin spikes. Sugar-free swaps help with the transition.
Eat less often, snack less
Constant grazing keeps the body in a fed, 'abundant' state that suppresses longevity genes. Reducing snacking is half the battle.
Watch your glucose response
He uses a CGM to learn which foods spike his blood sugar, then adjusts. A short stint is enough to learn your patterns.
- People drawn to longevity who want eating principles, not a rigid plan
- Those ready to drop snacking and sugar
- Anyone easing into time-restricted eating
- Data-curious eaters who'll try a CGM
- This is not for everyone. Skipping meals and longer fasts are not advised for anyone under ~18 to 20, during pregnancy or breastfeeding, or with a history of disordered eating.
- We deliberately don't give calorie targets. If food, weight or restriction feels stressful or compulsive, this protocol isn't for you, and support is available.
- If you take medication, especially for diabetes (insulin, metformin) or blood pressure, fasting can be risky without medical supervision. Talk to your doctor first.
- This is Sinclair's personal, self-experimented routine, not a proven prescription. A registered dietitian can adapt the principles safely to you.
- We may earn a commission on products bought through this page; these can also be bought elsewhere.
- July 3, 2026 Protocol published.
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Not medical advice. This page is for education only and is not a substitute for professional medical care. Consult a qualified clinician before changing your health routine.
Independent curation. YourProtocol.ai is an independent platform. This protocol is based on the publicly available work of David Sinclair and is not created, reviewed, endorsed by, or affiliated with David Sinclair or Harvard.