David Sinclair's Anti-Aging Routine: What He Eats, Takes, and Avoids at 56

At 56, Harvard genetics professor David Sinclair is trying to answer a question that affects every person alive: How much of the damage we associate with aging can we actually prevent, slow down, or even reverse?

He's spent decades studying that question.

And while most of us are still being told that losing energy, muscle, and mental sharpness is simply part of getting older, Sinclair is investigating the biological processes behind those changes.

His research has taken him from experiments involving yeast and mice to a new human clinical trial investigating whether some age-related changes in cells can be reversed.

But there's something even more interesting for anyone who wants to stay healthy today.

What does a scientist who studies aging actually do to protect his own health?

Does he avoid meat?

Does he fast?

What supplements does he take?

And why, after roughly 15 years, does he still take NMN?

In a recent appearance on The James Altucher Show, Sinclair opened up about his personal longevity routine, including the foods he's cut out, the supplements he continues to use, and the health markers he watches.

Some of his choices are surprisingly simple.

Others involve biology that scientists are only beginning to understand.

And one experiment with his diet produced results that surprised even him.

He Thought He Was Already Healthy. Then He Changed His Diet.

Sinclair has been studying aging for decades.

He knows the research, monitors his health, and has access to leading scientists working on longevity.

You'd think he had his diet pretty well figured out.

Then his partner, Serena Poon, encouraged him to make some changes.

Less meat.

Less cheese.

And almost no alcohol.

Sinclair was already paying close attention to his health, but he decided to see what would happen.

According to his account, the changes coincided with a substantial improvement in his inflammation markers.

He also describes his current blood-test markers as appearing younger than his chronological age.

These are his personal observations, rather than evidence that this diet will produce the same results for everyone.

Still, there's a useful lesson here.

Even when you think your diet is healthy, there may be room to improve what your body is dealing with every day.

Because aging is affected by much more than the number of calories you eat.

The quality of your food, your metabolic health, and your body's response to chronic stress all deserve attention.

What Sinclair eats now

His diet has become largely plant-focused, with relatively little meat or cheese and very little alcohol.

For anyone trying to follow a similar approach, a sensible place to start is replacing some processed and red meat with foods such as:

• Lentils, beans, and chickpeas

• Vegetables and leafy greens

• Nuts and seeds

• Whole grains

• Olive oil and other unsaturated fats

• Fish, if it fits your diet

These foods can help improve the overall nutritional quality of your diet.

And there's good evidence behind reducing processed meat and eating more fiber-rich plant foods.

You don't need to become a strict vegetarian overnight.

You can start by changing a few meals each week.

What matters is building habits you can keep.

But changing what you eat is only one part of Sinclair's routine.

Because the next part happens inside your cells.

The Molecule Sinclair Has Been Studying for Decades: NAD+

Your body contains trillions of cells.

And every second, those cells are doing an enormous amount of work.

Your muscles need energy to contract.

Your brain needs energy to process information.

Your tissues need to maintain themselves.

Even when you're sitting perfectly still, your cells are running countless chemical reactions to keep you alive.

Many of those reactions depend on a molecule called NAD+.

Its full name is nicotinamide adenine dinucleotide.

Fortunately, NAD+ is easier to remember.

Why should you care about NAD+?

Because it plays a central role in cellular energy metabolism.

Your mitochondria use NAD+ during the series of reactions that help produce ATP, the molecule cells use to power their activities.

NAD+ also participates in processes involved in cellular maintenance and responses to stress.

Among the proteins that depend on NAD+ are sirtuins, which Sinclair has studied extensively.

These proteins help regulate cellular processes associated with metabolism, stress responses, and gene activity.

And this is where the aging connection gets interesting.

NAD+ metabolism changes with age, and researchers are investigating whether maintaining NAD+ availability can help support healthier cellular function.

The evidence suggests that NAD+ levels decline in some tissues and circumstances, although the pattern isn't identical throughout the body.

That raises an important question.

If NAD+ is so important to energy metabolism and cellular maintenance, can supporting its production help us age more healthily?

It's one of the questions driving research into NMN.

And it's also why Sinclair continues to take it.

Why David Sinclair Still Takes NMN After Roughly 15 Years

During the podcast, Sinclair confirms that he's been taking NMN for approximately 15 years.

His father has also taken it.

For someone who has spent decades researching NAD+ and cellular aging, that's an interesting personal choice.

But what exactly does NMN do?

NMN, or nicotinamide mononucleotide, is a precursor your body can use to produce NAD+.

That means it participates in the process of making a molecule your cells need for normal energy metabolism.

Think of it this way.

Your mitochondria are constantly working to produce the energy your cells need.

NAD+ plays a key role in that process.

And NMN gives the body a compound it can use to replenish its NAD+ supply.

That explains the biological interest in NMN.

But does taking more NMN actually make a measurable difference?

What human studies have found

A 2026 systematic review examined 113 studies, including 33 human intervention studies and 80 animal studies.

One finding stood out.

Oral NMN and related NAD+ precursors consistently increased NAD-related biomarkers in human studies.

That is important.

It shows that these compounds can produce measurable biological changes.

The research also found that improvements in physical performance, metabolic health, and other health outcomes were inconsistent.

Some trials reported encouraging results. Others found little or no meaningful difference.

Long-term human lifespan extension has not been established. ^[1]

So there is a clear reason researchers continue studying NMN, alongside questions they still need to answer.

And if you're someone who takes cellular health seriously, understanding that difference matters.

You're making a decision about something you may take every day.

You deserve to know what the research supports.

Why oral NMN gets more attention than NAD+ injections

Here's another interesting point from Sinclair's interview.

With NAD+ injections and IV treatments becoming popular in longevity clinics, you'd expect a scientist focused on NAD+ to be enthusiastic about them.

Instead, Sinclair points to the stronger controlled evidence available for oral NMN.

Human trials have examined oral NMN under placebo-controlled conditions.

By comparison, evidence for the claimed anti-aging benefits of NAD+ injections remains limited.

A 2026 scientific review found that clinical evidence for the anti-aging benefits of NAD+ injections remains limited. Read the scientific review.

And that's worth remembering before spending a large amount of money on a treatment because it's being promoted as the latest longevity breakthrough.

A treatment being expensive or invasive doesn't prove it works better.

For people interested in supporting NAD+ metabolism, oral NMN has a more developed human research base than injected NAD+.

That doesn't establish that NMN extends life.

But it gives you a credible scientific starting point.

Interested in adding NMN to your longevity routine?

At Genevity+, we offer two ways to explore NMN supplementation:

Genevity+ NMN Lipo Capsules

A convenient capsule format for people who prefer a straightforward daily supplement routine.

Genevity+ Pure NMN Powder

A powder format for people who prefer measuring their own serving according to product guidance.

Both provide NMN, a precursor involved in NAD+ production.

And if you're thinking about including NMN in your routine, start with the basics: understand the ingredient, check the dosage, and look for clear product quality information.

Explore Genevity+ NMN Supplements

Genevity+ is not affiliated with or endorsed by David Sinclair.

The Wine Habit Sinclair Gave Up

Let's talk about alcohol.

Because this is one of the more interesting contradictions in longevity culture.

For years, red wine enjoyed a reputation as something that might help people live longer.

A lot of that interest came from resveratrol, a natural compound found in grapes.

Sinclair's early research helped attract attention to resveratrol and its relationship with sirtuin biology.

But there's a problem with treating red wine as a health supplement.

Alcohol itself carries known risks, and the small amount of resveratrol in a glass of wine doesn't cancel them out.

Sinclair now reports drinking very little alcohol.

It's one of the changes he associates with improvements in his own health measurements.

What happens when you reduce alcohol?

For people who drink regularly, reducing alcohol can help improve sleep and reduce certain health risks.

Alcohol can interfere with normal sleep patterns, even when it initially makes you feel sleepy.

And the health effects of alcohol deserve more attention than the supposed benefits of compounds found in wine.

If you want a practical place to begin, look at how many evenings per week include a drink.

Then consider reducing that number.

You don't have to overhaul your entire routine in one day.

But it's worth understanding what regular alcohol consumption may be costing your health.

Sinclair Also Pays Attention to When He Eats

There's another habit that has featured in Sinclair's discussions of longevity.

Intermittent fasting.

In the podcast, James Altucher describes trying to follow an intermittent fasting routine, and Sinclair discusses the importance of metabolic health.

The scientific interest comes from the way cells respond to nutrient availability.

When food is abundant, the body activates processes that help it use and store nutrients.

During periods without food, metabolic signals change.

Scientists study these responses because they are connected with pathways involved in energy regulation and cellular stress.

Some human research suggests time-restricted eating can improve certain metabolic measures, particularly when it helps.

🎙️ Want to hear the full conversation?

Watch Harvard genetics professor David Sinclair discuss his anti-aging routine, NMN, diet, sleep, and the latest longevity research on The James Altucher Show.

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