NAD+ vs NADH: What's the Difference?

NAD+ and NADH are essentially the same molecule in two different states, differing only by a hydride — a hydrogen atom with an extra electron. NAD+ is the 'oxidised' form; NADH is the 'reduced' form that's carrying electrons. Your cells constantly convert between the two as part of normal energy production.

Oxidation vs Reduction, Explained Simply

These chemistry terms describe electron movement. When NAD+ gains a hydride (picks up electrons), it becomes NADH — this is 'reduction.' When NADH loses that hydride, it converts back to NAD+ — this is 'oxidation.' This cycle happens continuously, millions of times, inside every cell in your body.

How This Powers Cellular Energy

When you eat, NAD+ captures electrons released as your body breaks down glucose, becoming NADH in the process. NADH then carries those electrons to your mitochondria's electron transport chain, where they're used to generate ATP — your cells' usable fuel. Once the electrons are delivered, NADH converts back to NAD+, ready to repeat the cycle.

Why the NAD+/NADH Ratio Matters

A healthy balance between NAD+ and NADH is what keeps energy production running efficiently. As NAD+ availability declines with age, this cycle can become less efficient — part of why NAD+ (specifically, not NADH) is the focus of most supplementation and injectable products on the market today.

Frequently Asked Questions

Is NADH a supplement too?

Yes, NADH supplements exist, though they're less common than NAD+ precursor or direct NAD+ products, partly because NADH is less stable and harder to formulate effectively.

Which is better to supplement, NAD+ or NADH?

Most current injectable and precursor products target NAD+ directly, since it's the form your body most readily converts and uses across multiple cellular processes.

Do NAD+ and NADH have different health effects?

They're the same core molecule at different stages of a single cycle, so it's more accurate to think of them as two states of one system rather than two separate compounds with different effects.

Is a high NADH level always better?

Not necessarily — what matters is a healthy overall balance and turnover between NAD+ and NADH, not maximising one form in isolation.

This article is for general informational purposes only and does not constitute medical advice. Always speak with a qualified healthcare professional before starting any new supplement or injectable therapy.