NAD+ and NADH supplements – what are they and what are their benefits?
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NAD+ and NADH are key molecules for cellular energy production. Their significance relates to metabolism, energy levels, and cellular aging. This article clarifies what these molecules are, how NAD+ supplements work, and who might benefit from them.
What is NAD+?
NAD+ (nicotinamide adenine dinucleotide) is a naturally occurring coenzyme in the body that all cells need. Its main roles include energy production in mitochondria, processes related to cellular metabolism, DNA repair processes, and regulatory mechanisms related to cellular aging. NAD+ acts as the “energy carrier of cells,” helping convert nutrients into usable energy.
NAD+ levels naturally decline with age, which can manifest as decreased energy levels and slower cellular repair mechanisms. For this reason, NAD+ is strongly linked to the body's longevity concept, meaning cellular-level lifespan. It has been found that NAD+ levels can drop to about 40-50% by middle age depending on the tissue, and in some tissues even to half of youthful levels. This is a significant decrease. Several cellular repair mechanisms consume NAD+, including DNA damage repair, oxidative stress, and bodily inflammation.
Weaker mitochondrial function can show up in daily life as reduced recovery ability, increased fatigue, decreased stress tolerance, fluctuating concentration, and a general decline in efficiency. Simply put, there isn’t enough energy to consistently cope with daily life, even if daily life isn’t exceptionally demanding. NAD metabolism is one of the underlying factors in these changes.
What is NADH?
NADH is the reduced, “charged” form of NAD+. To simplify their roles, you could say NAD+ accepts electrons and NADH carries them to cellular energy production. NADH is thus a central part of ATP production (the main energy molecule used by cells).
Imagine, for example, an empty and a charged battery. NAD+ is the empty one and NADH the charged one. The cycle that keeps cells alive is roughly as follows: NAD+ accepts electrons and becomes NADH. When NADH donates electrons, it turns back into NAD+.
Both are needed, but their roles in the process differ slightly. NADH has been studied in relation to fatigue syndrome, Parkinson’s disease, and cognitive alertness. Some studies suggest that NADH is somewhat less effective at raising NAD levels than NMNH.
What is NMNH?
NMNH is the reduced form of nicotinamide mononucleotide (NMN) and a precursor to NADH. It is needed to build NADH. NMNH is a newer discovery whose existence and importance have only been recognized in recent studies. Research on this molecule is still in early stages, so not all of its properties are fully known. However, it is already known to be closely related to NAD metabolism, and some studies have found it absorbs and transports into cells especially efficiently due to its small molecular size. Additionally, certain tissues have been found to contain NMN transport proteins. Thanks to NMNH, the cell can produce NAD+ itself. Studies have shown NMNH’s ability to raise NAD levels in tissues and improve some metabolic markers.
Currently, NMNH is believed to be a very effective way to raise NAD levels, which is why longevity and biohacker experts are particularly interested in it. Research on this topic continues.
Why try to raise NAD+ levels with supplements?
The idea is based on the fact that higher NAD+ levels can support energy production and affect cellular repair mechanisms. NAD+ activates sirtuin proteins, which are related to aging and cellular metabolism. Sirtuins only function if there is enough NAD+.
NAD+ levels are supported by a combination of NAD+ supplements and lifestyle choices.
What benefits does NAD+ offer?
Numerous studies support the longevity concept and the connection between NAD+ levels, cellular health, and slowing bodily aging. The research data is promising but still partly ongoing. It is already known that NAD+ levels naturally decline with age and that NAD+ is critical for cellular function.
Based on research and practical experience, possible benefits of NAD supplements may include:
- More energy and endurance – NAD is involved in mitochondrial energy production
- Support for brain function – NADH may improve concentration and alertness
- Effects related to aging – maintaining NAD+ levels may support cellular repair mechanisms
- Metabolic health – possible effects on insulin sensitivity and metabolism
How to effectively raise NAD+ levels
It is important to note that NAD is not a miracle cure. NAD+ supplements work best when lifestyle supports NAD metabolism. Regular exercise is important, especially aerobic exercise, which is particularly beneficial in this regard. Fasting has been found to affect sirtuin activity as part of cellular energy regulation. Intermittent fasting often fits best into daily routines and can produce results even on its own. Good sleep is also important to support mitochondrial function, as well as heat and cold exposure to activate energy mechanisms.
Together with optimal lifestyle choices, NAD+ can deliver its true power most effectively.
