NAD Levels: A New Indicator of Heart Health

Recent research suggests that a molecule commonly associated with aging may actually be a better predictor of heart health. A study involving over 1,000 adults indicates that the levels of nicotinamide adenine dinucleotide (NAD) in the blood are more closely related to cardiovascular diseases than to a person’s age.

Understanding NAD and Its Importance

NAD is a crucial coenzyme found in all living cells that plays a significant role in converting food into energy. Its importance in various cellular processes has led scientists to explore how fluctuations in NAD levels may be linked to the aging process. Early animal studies indicated that NAD levels decline in certain tissues as organisms get older, which sparked interest in NAD-boosting supplements like NMN and NR.

Study Insights from Lithuania

A team of researchers from Vilnius University in Lithuania conducted an in-depth analysis of NAD levels in blood samples from 1,068 adults, including individuals with chronic illnesses and those in good health. They carried out a total of 1,340 measurements from small dried blood spots collected using standardized methods.

The findings, published in November 2026 in Nature Metabolism, revealed that NAD levels remained relatively stable in healthy men throughout various ages. Interestingly, in healthy women, NAD levels demonstrated a slight increase with age rather than a decrease.

Linking NAD to Heart Health

For participants with pre-existing heart and vascular conditions, however, the results were strikingly different. Those individuals exhibited significantly lower levels of NAD, particularly among those diagnosed with high blood pressure. This condition can lead to long-standing damage to blood vessels, increasing the likelihood of severe complications such as heart attacks and strokes.

High blood pressure often presents no clear symptoms, underscoring the importance of regular monitoring to catch potential health issues early.

Implications of the Findings

The researchers emphasized that these results challenge the conventional belief that blood NAD levels universally decline with age. It appears that an individual’s overall health could be a more relevant factor in understanding NAD blood test results than simply noting their age.

However, it is crucial to note that this study does not definitively prove that low NAD levels cause heart disease. Factors such as heart disease or varying health conditions could also influence the levels of NAD detected in the blood. Moreover, measuring NAD in blood does not necessarily reflect its state in the heart, brain, or muscles.

The current findings do not suggest that NAD supplements can prevent aging or act as a safeguard for the heart. Further research is needed to determine whether measuring blood NAD levels can predict the risk of future illnesses and provide valuable insights beyond traditional health assessments like blood pressure readings and cholesterol tests.

A Word of Caution

While there is promise in the idea that blood NAD levels could offer insight into health status, caution is advised before jumping to conclusions. A measurement linked to potential illness is merely a piece of the puzzle and should not be viewed as a diagnosis or an immediate reason to purchase supplements.

Those interested in understanding more about health and heart disease should also explore related topics, such as the effect of Vitamin D supplements on heart health and lifestyle interventions that can enhance memory in older adults.