Vitamin B3, NAD+ and NMN: Understanding the Connection
Vitamin B3, NAD+ and NMN are related compounds that are often discussed together in the context of cellular biochemistry and nutrition. Understanding how they differ and how they are connected can help put current research into perspective.
What is Vitamin B3?
Vitamin B3 is a water-soluble vitamin that includes the forms niacin and nicotinamide. It is an essential nutrient involved in normal energy metabolism and several other biochemical processes in the body.
Vitamin B3 contributes to the formation of coenzymes used in numerous cellular reactions. Two important coenzymes associated with vitamin B3 metabolism are NAD+ and NADP+.
What is NAD+?
Nicotinamide adenine dinucleotide, commonly known as NAD+, is a coenzyme found in cells throughout the body.
NAD+ participates in many biochemical reactions, including reactions involved in cellular energy metabolism. It exists as part of a system of related forms that are continually converted during normal cellular processes.
NAD+ is therefore a component of normal cellular biochemistry rather than a nutrient in the same sense as vitamin B3.
What is NMN?
Nicotinamide mononucleotide, or NMN, is a compound involved in a biochemical pathway associated with NAD+ synthesis.
NMN has been the subject of scientific research, including studies examining its metabolism and its relationship with NAD+ pathways. Research findings need to be interpreted carefully, particularly when laboratory or early human research is discussed in relation to health outcomes.
How are Vitamin B3, NAD+ and NMN connected?
Vitamin B3, NAD+ and NMN are connected through biochemical pathways involved in cellular metabolism.
- Vitamin B3 provides forms of vitamin B3 used in the body's biochemical pathways.
- NAD+ is a coenzyme involved in numerous cellular reactions.
- NMN is an intermediate associated with one of the pathways involved in NAD+ synthesis.
These biochemical relationships do not, by themselves, establish that consuming a particular form or increasing the amount of a compound will produce a specific health outcome.
Vitamin B3 in the diet
Vitamin B3 can be obtained from a varied diet. Foods that provide vitamin B3 include:
- Meat and poultry
- Fish and seafood
- Peanuts and other legumes
- Wholegrain and fortified cereals
- Some dairy products
The body can also make some niacin equivalents from the amino acid tryptophan.
What does current research tell us?
NAD+ metabolism and NMN continue to be areas of scientific research. Researchers are investigating the biochemical pathways involving these compounds and their behaviour under different physiological conditions.
It is important to distinguish between a biochemical mechanism and an established clinical outcome. A compound may participate in a biological pathway without evidence showing that supplementation produces a particular health benefit.
Research findings can also differ depending on the study design, population, dose, duration and form of the compound being investigated. Results from laboratory or animal studies cannot automatically be applied to people.
Vitamin B3, NAD+ and NMN are not interchangeable
Although these compounds are connected biochemically, they are not the same substance and should not be treated as interchangeable.
Vitamin B3 is an established dietary nutrient. NAD+ is a naturally occurring coenzyme involved in cellular reactions, while NMN is a compound associated with the biochemical pathway involved in NAD+ synthesis.
Food sources of Vitamin B3, NAD+ and NMN
| Nutrient | Food Source | Relative Concentration |
|---|---|---|
| Vitamin B3 (Niacin) | ||
| Tuna | High | |
| Chicken (breast) | High | |
| Turkey | High | |
| Beef (liver) | High | |
| Peanuts | Moderate | |
| Salmon | Moderate | |
| Sunflower Seeds | Moderate | |
| Brown Rice | Moderate | |
| Fortified Cereals | Moderate | |
| Lentils | Low to Moderate | |
| Dairy Products (Milk, Eggs) | Low | |
| Whole Wheat Products | Low | |
| NAD+ Precursors | ||
| Turkey (Tryptophan) | High | |
| Chicken | High | |
| Dairy Products | Moderate | |
| Niacin-rich Foods (Tuna, Chicken, etc.) | Moderate to High | |
| NMN (Nicotinamide Mononucleotide) | ||
| Broccoli | High | |
| Cabbage | High | |
| Edamame (Young Soybeans) | High | |
| Cucumbers | Moderate | |
| Avocados | Moderate | |
| Tomatoes | Low to Moderate |
A balanced approach to nutrition
A varied diet provides a broad range of essential nutrients and other naturally occurring compounds. For questions about nutritional requirements or whether a particular supplement is appropriate, a pharmacist, dietitian or other qualified healthcare professional can provide advice based on individual circumstances.
Important information
This article is provided for general educational purposes only. It does not diagnose, treat, cure or prevent any disease or medical condition, and it is not intended to recommend the use of any particular therapeutic good.
Scientific research relating to NAD+ metabolism and NMN continues to develop. Information about therapeutic goods, ingredients and permitted claims should always be considered in accordance with current Australian regulatory requirements.