Does NAD+ Help Hair Growth? Exploring Anti-Aging Supplements

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Hair loss and thinning can have a significant impact on one's self-esteem and confidence. As a result, many individuals are constantly searching for effective solutions to promote hair growth and revitalize their locks. One potential solution that has garnered attention in recent years is NAD+, a naturally occurring coenzyme found in all living cells. In this article, we'll explore the question, "Does NAD+ help hair growth?" and provide an in-depth analysis of the available research and scientific evidence.

Does NAD+ Help Hair Growth?

The short answer is: Yes, NAD+ may help promote hair growth, but further research is still needed to fully understand its mechanisms and efficacy. NAD+ (nicotinamide adenine dinucleotide) is a crucial coenzyme involved in various cellular processes, including energy production, DNA repair, and cellular regeneration. It has been found to play a role in the hair growth cycle and may help stimulate the growth and maintenance of healthy hair follicles.

Understanding the Hair Growth Cycle

Before delving into the potential effects of NAD+ on hair growth, it's essential to understand the hair growth cycle. Hair growth occurs in three distinct phases: the anagen (growth) phase, the catagen (transition) phase, and the telogen (resting) phase. During the anagen phase, hair follicles actively produce new hair strands, while in the catagen phase, hair growth slows down, and the follicles begin to shrink. Finally, in the telogen phase, the hair shaft detaches from the follicle, and the follicle remains dormant until the cycle starts again.

The Role of NAD+ in Hair Growth

NAD+ plays a crucial role in the proper functioning of hair follicles by supporting cellular energy production and DNA repair mechanisms. Research has shown that increased levels of NAD+ can prolong the anagen (growth) phase of the hair cycle, allowing hair follicles to remain in the active growth stage for a longer period.

Additionally, NAD+ has been found to support the proliferation and differentiation of hair follicle stem cells, which are responsible for generating new hair strands. By promoting the growth and renewal of these stem cells, NAD+ may help counteract hair loss and encourage the formation of new, healthy hair.

Scientific Evidence and Studies

While the research on the direct effects of NAD+ on hair growth is still relatively limited, several studies have provided promising insights into its potential benefits:

  1. In vitro studies: Experiments conducted on isolated hair follicle cells have demonstrated that NAD+ supplementation can enhance the growth and survival of these cells, potentially contributing to improved hair growth and density.
  2. Animal studies: Research on mice has shown that topical application of NAD+ or its precursors, such as nicotinamide riboside (NR), can stimulate hair growth and promote the transition of hair follicles from the resting phase to the active growth phase.
  3. Human studies: While human trials specifically investigating the effects of NAD+ on hair growth are limited, some studies have explored the use of NAD+ precursors, like NR, for various health conditions. These studies have reported improvements in various aspects of cellular health, which may indirectly support hair growth and overall hair quality.

Potential Mechanisms and Considerations

While the exact mechanisms by which NAD+ contributes to hair growth are not fully understood, researchers have proposed several potential pathways:

  1. Activation of sirtuins: NAD+ is a key regulator of sirtuins, a group of enzymes involved in various cellular processes, including DNA repair, metabolism, and aging. Increased sirtuin activity has been linked to improved hair follicle health and hair growth.
  2. Regulation of energy metabolism: As a crucial component of cellular energy production, NAD+ may support the energy demands of hair follicles during the active growth phase, allowing for optimal hair growth.
  3. Antioxidant properties: NAD+ has been shown to possess antioxidant properties, which may help protect hair follicles from oxidative stress and damage, contributing to healthier hair growth.

It's important to note that while NAD+ supplementation may offer potential benefits for hair growth, individual results may vary, and it should not be considered a cure-all solution for hair loss. Factors such as genetics, underlying health conditions, and lifestyle choices can also play a significant role in hair health and growth.

Boosting NAD+ Levels

If you're interested in exploring the potential benefits of NAD+ for hair growth, there are several ways to increase your NAD+ levels:

  1. Dietary sources: Certain foods, such as milk, eggs, fish, and green vegetables, are rich in precursors like tryptophan and niacin, which can help boost NAD+ production in the body.
  2. Supplements: NAD+ precursors like nicotinamide riboside (NR) and nicotinamide mononucleotide (NMN) are available as dietary supplements. However, it's essential to consult with a healthcare professional before starting any new supplement regimen.
  3. Lifestyle changes: Engaging in regular exercise, managing stress levels, and maintaining a healthy sleep cycle can also support NAD+ production and overall cellular health.


While the research on the direct effects of NAD+ on hair growth is still in its early stages, the available evidence suggests that this coenzyme may play a supportive role in promoting healthy hair growth and hair follicle function. By supporting cellular energy production, DNA repair mechanisms, and potentially activating sirtuins, NAD+ may contribute to prolonging the anagen phase and stimulating the growth of new hair strands.

However, it's crucial to maintain realistic expectations and understand that NAD+ supplementation alone may not be a magic solution for severe or persistent hair loss. A comprehensive approach that addresses underlying health conditions, lifestyle factors, and incorporates other proven hair growth treatments may be necessary for optimal results.

As with any supplement or treatment, it's always advisable to consult with a healthcare professional or a qualified trichologist (hair and scalp specialist) before incorporating NAD+ into your hair growth regimen. They can provide personalized advice and guidance based on your individual circumstances and medical history.

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