If you’ve followed health advice over the past few decades, you’ve likely experienced a kind of nutritional whiplash.

There was a time when vitamins were positioned as a daily safeguard—a simple way to prevent disease and support longevity. Then came a wave of large clinical trials that challenged that optimism. The message shifted: for most people, supplements were unnecessary, perhaps even ineffective for preventing major diseases, and nutrients were best obtained through whole foods.

So which is it?

The answer is more nuanced than either extreme. Supplements are neither a cure-all nor a waste of time (and money). They occupy a narrower, more strategic role—one that becomes increasingly relevant as we age.

Aging changes the equation

Aging, of course, is not a single process but a convergence of many: declining muscle mass, changes in nutrient absorption, shifts in metabolism, and increased vulnerability to chronic disease.

Supplements don’t override these processes—but they may help support them.

At the same time—as much as we want it to be so—even the best-studied supplements rarely show clear evidence of extending lifespan in humans. A 2025 review of multivitamin research, encompassing millions of participants, concluded that their impact on longevity remains uncertain. In other words, improving a biological marker or filling a deficiency is not necessarily the same as adding years to life.

Where supplements may help

They can support specific aspects of aging—especially where physiological gaps emerge.

Here are some key supplements to know about:

Protein: Muscle loss (sarcopenia) is one of the most consistent features of aging. Adequate protein intake helps mitigate this decline, particularly when paired with resistance training. Reviews of aging interventions consistently identify protein—alongside exercise—as central to preserving strength and independence.

Creatine: No longer just for athletes, research shows creatine can support muscle mass and physical performance in older adults, especially when combined with training. Emerging evidence also suggests potential cognitive and mood benefits, though these areas are still being studied.

Vitamin D: Per Harvard Health, getting your Vitamin D may slow aging by influencing biological markers such as telomere length. And as we reported here, the “sunshine vitamin” helps to maintain strong bones, support the immune system and reduce inflammation. Vitamin D deficiency becomes more common with age.

Omega-3 Fatty Acids: Omega-3s remain best supported for cardiovascular health, but newer research, as reported here, suggests they may also influence biological aging markers. In the DO-HEALTH trial, omega-3 supplementation was associated with slightly slower biological aging, particularly when combined with vitamin D and exercise.

Vitamin B12: As we age, absorption of vitamin B12 declines, increasing the risk of deficiency. While supplementation doesn’t appear to enhance cognition in already healthy individuals, maintaining adequate levels is critical for neurological and hematologic health.

Multivitamins: Multivitamins may offer small benefits in certain populations, particularly where dietary gaps exist. But the overall evidence does not support strong claims for longevity or disease prevention in generally healthy adults.

Other workhorses of nutritional aging

Alongside these more established players are a few nutrients that receive less attention, but may still play important supporting roles.

Magnesium: The often overlooked essential. Magnesium is involved in hundreds of physiological processes, including muscle function, nerve signaling, sleep regulation, and metabolic health. Intake is often suboptimal, particularly in older adults. Maintaining adequate magnesium levels may support resilience across multiple systems—from sleep quality to muscle performance.

Coenzyme Q10: Cellular energy support. CoQ10 plays a key role in mitochondrial energy production, and levels naturally decline with age. It may be particularly relevant for people taking statin medications, which can lower CoQ10 levels. While evidence for general longevity benefits is limited, it may offer targeted support for energy and cardiovascular function in specific populations.

Choline: Brain and cellular health. Choline is essential for brain function, liver health, and cell membrane integrity. Many people do not meet recommended intake levels. Its role in aging is best understood as part of overall nutritional adequacy—particularly for cognitive health—rather than as a standalone supplement for longevity.

What about “longevity supplements”?

Then there are the newer entrants: supplements aimed explicitly at longevity, often targeting metabolic or cellular pathways.

Berberine, for example, has gained attention for its effects on blood sugar and metabolic health, sometimes compared to pharmaceutical interventions like metformin. While promising, most of the evidence comes from individuals with metabolic dysfunction, not healthy aging populations.

More broadly, many longevity-focused compounds show compelling results in early or animal research—but translating those findings into meaningful human outcomes remains a work in progress.

The bottom line

So where does this leave us?

Supplements can certainly play a role in healthy aging, but a supporting one. They are most useful when addressing specific deficiencies and supporting known physiological changes (like muscle loss). Think of them as an important component of your longevity toolkit as a way to compliment, but not replace, lifestyle practices like exercise, nutrition, sleep, social connection and preventive care.