What Is NAD+ and Why Did David Sinclair Talk About It on Steven Bartlett’s Podcast?

David Sinclair’s recent appearance on The Diary of a CEO with Steven Bartlett has sparked a huge wave of interest in NAD+, NMN and healthy ageing.

Across social media, podcasts and search engines, more people are asking the same questions. What is NAD+? Why does it matter? And why is it suddenly being talked about everywhere?

A big reason this topic has taken off is because Sinclair has a way of making complex science feel simple and memorable. During the conversation, he summed up one of his biggest ideas in a line that instantly grabbed attention: “DNA is not your destiny.”

That one quote helps explain why so many people are now paying closer attention to their lifestyle, routines and supplements.

What Is NAD+?

NAD+ stands for nicotinamide adenine dinucleotide. It is a coenzyme found in every cell of the body and it plays a central role in cellular energy production.

In simple terms, NAD+ helps your body convert food into usable energy. It is also involved in important processes linked to cellular repair, mitochondrial function and how cells respond to stress.

Because of this, NAD+ has become one of the most talked-about molecules in the healthy ageing space.

Researchers have found that NAD+ levels tend to decline with age. That is one of the reasons the conversation around supporting NAD+ has become so popular in recent years.

Why Was David Sinclair Talking About NAD+?

David Sinclair has spent years discussing the biology of ageing and the role NAD+ may play in that process. On Steven Bartlett’s podcast, he explained ageing through what he often calls the information theory of ageing.

The basic idea is that ageing is not just about the body wearing out. It is also about cells gradually losing their ability to read biological instructions properly over time.

At one point in the episode, Sinclair described it like this: “the cells don’t read it correctly.”

That line stood out because it gave people a simple way to understand a very complicated idea. According to this theory, the information is still there, but the system reading it becomes less reliable with age.

This is one reason Sinclair talks so much about NAD+, sirtuins and cellular resilience. These are all areas linked to how well cells produce energy and maintain function as we get older.

What Does NAD+ Actually Do?

NAD+ is involved in a wide range of processes in the body, but one of its best-known roles is helping support cellular energy production.

It also interacts with proteins called sirtuins, which are often discussed in research around ageing, stress responses and metabolic health.

That is why NAD+ is often mentioned in the same conversation as longevity, energy and healthy ageing routines.

It is important to keep expectations realistic though. NAD+ is a fascinating area of research, but it is not a magic switch. Long-term health still comes back to the basics like sleep, movement, nutrition, stress management and consistency.

Where Does NMN Come In?

NMN stands for nicotinamide mononucleotide. It is a precursor to NAD+, which means the body can use it as a building block to help produce NAD+.

That is why NMN is often discussed alongside David Sinclair’s work.

In the episode, Sinclair explained that NMN is directly converted into NAD in the cell, which is one reason it has become so popular in the healthy ageing space.

Human research in this area is still developing, but interest has grown quickly as more people look for ways to support their energy, focus and long-term wellbeing.

Why Is This Going Viral Now?

Steven Bartlett has a huge audience and his podcast regularly turns complex topics into mainstream conversations.

When someone like David Sinclair appears and starts talking about biological age, NAD+, cell function and future health, people listen.

It is also landing at the right time. More people are thinking beyond quick fixes and asking bigger questions about how they can stay sharp, energised and active as they get older.

That is why topics like NAD+, NMN, fasting, stress resilience and daily habits are suddenly everywhere.

What Should People Take From It?

The biggest takeaway is not that one molecule changes everything.

It is that the way you live each day matters more than most people realise.

That is part of what made Sinclair’s appearance on Steven Bartlett’s podcast resonate so strongly. It connected cutting-edge science with something practical. Your daily choices matter.

Supplements may play a role in supporting a strong routine, but they should sit alongside the foundations, not replace them.

Our Take at My Dailys

At My Dailys, we believe better health starts with the basics done consistently.

That means building strong daily habits and choosing clean supplements that support your routine without unnecessary extras.

Our approach is simple. Quality matters. Transparency matters. Daily habits matter.

If you are exploring topics like NAD+, NMN and healthy ageing after watching David Sinclair on Steven Bartlett’s podcast, focus on the bigger picture first. Sleep better. Move more. Eat well. Stay consistent. Then look at supplements that fit into that routine properly.

Our My Dailys NMN is made with 99% pure beta-NMN, with no fillers, binders or anti-caking agents. Every batch is third-party tested for purity and quality, so you know exactly what you are putting into your body.

If you want to explore our 99% pure NMN, you can view it here:

https://www.mydailys.health/products/nmn-capsules

Final Thoughts

David Sinclair’s appearance on Steven Bartlett’s podcast has helped push NAD+ even further into the spotlight.

And while the science of ageing is still evolving, one thing is clear. More people are now taking an interest in how their cells function, how their habits shape their future and how to support healthier ageing in a more proactive way.

That is a conversation worth paying attention to.