Every generation gets its own set of anti-aging supplements. Some fade quickly. Others earn a closer look because they are grounded in real human biology rather than marketing hype. In recent years, supplements aimed at longevity have gained attention, particularly among adults over 50 who want to preserve energy, strength, and cognitive function. The challenge is knowing which ones deserve thoughtful consideration.
One compound attracting legitimate scientific interest is NAD, or nicotinamide adenine dinucleotide. NAD is not a trendy invention. It is a molecule found in every living cell. It plays a central role in converting food into energy inside mitochondria and is required for DNA repair and cellular stress responses. Research shows that NAD levels decline with age, which may help explain why stamina, recovery, and resilience to disease often diminish over time.
Because NAD itself is poorly absorbed when taken orally, supplements such as NMN, nicotinamide mononucleotide, and NR, nicotinamide riboside, are used as precursors. Animal studies have consistently shown benefits related to metabolic health and mitochondrial function. Human research is still evolving, but clinical trials demonstrate that NMN and NR can safely raise NAD levels and may improve markers of insulin sensitivity, muscle metabolism, and fatigue. Claims of dramatic life extension, however, remain unproven.
Another supplement with strong evidence, though often overlooked, is creatine. Commonly associated with athletics, creatine has been shown in adults over 50 to support muscle strength, reduce age-related muscle loss, and even improve cognitive performance during periods of stress. Unlike many longevity supplements, creatine has decades of human data supporting both its effectiveness and safety.
Omega-3 fatty acids also deserve mention. While not marketed as longevity supplements, omega-3s reduce inflammation, support cardiovascular health, and may help slow cognitive decline. Large population studies consistently associate higher omega-3 intake with reduced cardiovascular risk, still the leading cause of death in older adults.
Not all popular longevity supplements hold up equally well. High-dose antioxidant vitamins (vitamin E, beta-carotene) were once promoted to prevent aging and chronic disease by “neutralizing free radicals.” Large human trials later showed that high-dose supplementation did not reduce mortality and in some cases increased risk, particularly in smokers. The emerging understanding is that some oxidative stress is necessary for cellular adaptation and repair, especially in response to exercise. This gap between theory and real-world benefit is common and highlights why evidence matters.
As a naturopathic physician, my role in healthy aging is not to chase supplement trends, but to help patients understand how these tools fit into the bigger picture. In clinical practice, this includes using detailed blood work to assess and monitor factors that strongly influence aging, such as thyroid function, insulin sensitivity, inflammation, lipid patterns, and nutrient status, alongside standard medical testing. Supplements are chosen thoughtfully and adjusted based on symptoms, objective markers, personal and family medical history.
For adults over 50, the most sensible approach is informed curiosity paired with individualized guidance. Supplements, including NAD precursors, creatine, and omega-3s, may support the biology of healthy aging when used appropriately and alongside strong lifestyle habits.
Aging well is less about finding a miracle pill and more about supporting the body’s capacity to repair, adapt, and function over time. When supplements are used thoughtfully, they can play a useful role, but they work best when grounded in science and personalized care.
Dr. Deidre Macdonald is a naturopathic physician practicing in downtown Courtenay. www.getwellhere.com 250 897-0235