A beginner’s guide to NAD+ and its health benefits

September 12, 2025
Nicole Haiduck, Wellness Editor

Meet the molecule behind the longevity buzz

NAD+ is having a moment. From wellness influencers to Harvard researchers, everyone’s talking about this tiny molecule that plays a huge role in how we age, feel, and function. But what exactly is NAD+, and why does it matter?


Let’s break it down into real terms—and explore why more people are turning to NAD+ therapy as part of their anti-aging routine.

What even is NAD+?

NAD+ stands for nicotinamide adenine dinucleotide. It’s a coenzyme found in every cell of your body, and it’s essential for energy production, DNA repair, and metabolic function. In short: your cells need it to stay healthy and do their job.


Think of NAD+ as cellular fuel. The more your cells have, the better they perform—and the better you feel.

Combatting our NAD+ levels that drop over time

As we age, NAD+ levels naturally decline. Factors like stress, poor sleep, alcohol use, and chronic inflammation can accelerate that drop. The result? Less energy, slower recovery, more brain fog, and signs of premature aging.


That’s why researchers have been exploring ways to replenish NAD+—and why people are turning to NAD+ injections as a way to support healthy aging from within.

What are the benefits of boosting NAD+?

When NAD+ levels are restored, people often report:

  • Improved focus and mental clarity
  • More energy and motivation
  • Better sleep and recovery
  • Reduced signs of aging
  • Enhanced cellular repair and resilience

These aren’t just surface-level perks. NAD+ helps your body repair DNA, protect cells from damage, and generate clean energy—all of which play a role in how well you age.

Which is the better route - injections or supplements?

The supplemental form of NAD+ is meant to be taken daily and a more affordable option. However, for those looking for the most dramatic reqsults, injections bypass the digestive system and deliver NAD+ directly into the bloodstream for faster, more reliable results.


At Belle, we offer both supplemental and self-administered NAD+ injections prescribed by licensed providers. We are proud to make sure everyone has access to accessible version of NAD+ with every budget in mind.

Is NAD+ just for people over 40?

Not at all. NAD+ therapy is popular among high performers, entrepreneurs, athletes, and anyone dealing with chronic fatigue, burnout, or brain fog—regardless of age. It’s also ideal for people recovering from stress, illness, or intense life phases where their body needs extra support.

The Takeaway

NAD+ isn’t just hype—it’s one of the most promising tools in the science of aging well. Whether you’re looking to feel sharper, stay energized, or protect your long-term health, NAD+ may be the missing piece.


And with Belle, it’s easier than ever to try it safely, at home, and on your terms.