Reviewed by Patricia Mikula, PharmD
Credit: Anastasiia Voloshko / Getty Images
In the quest for healthy aging, many are turning to longevity supplements, searching for effective solutions backed by science. While research in animals shows promising results, the evidence for human safety and efficacy remains limited. Factors such as lifestyle, health conditions, and genetics can all influence the effectiveness of these supplements. Furthermore, the marketing of longevity products often diverges from scientific findings. This article examines expert opinions on which longevity supplements hold true potential and which may be overstated.
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Studies on longevity supplements conducted in animals have shown promising outcomes, but there’s a lack of substantial evidence supporting their safety and efficacy in humans.
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Lifestyle choices, pre-existing health issues, and genetic factors can all impact the effectiveness of longevity supplements.
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The interpretation of longevity supplements by the supplement industry for promotional purposes often differs from the scientific perspective.
A 2025 report by McKinsey revealed that about 60% of people consider healthy aging a top priority. With a plethora of supplements positioned as miracle solutions for reversing aging, Health spoke to longevity experts—healthcare professionals and researchers dedicated to employing evidence-based methods for enhancing lifespan and wellbeing—to discern which supplements are genuinely beneficial and which ones are merely hype.
Expert Consensus on Longevity Supplements
Experts often hold varied opinions on the effectiveness of longevity supplements, with some viewing their benefits as highly individualized, contingent on a person’s unique situation. While definitive consensus is scarce, several supplements repeatedly emerge in discussions with health professionals as having tangible benefits.
1. Vitamin D
Research suggests that supplementing with around 2,000 I.U. of vitamin D daily may help slow cellular aging. A deficiency in vitamin D is linked to an elevated risk of age-related conditions, including Alzheimer’s disease, cognitive decline, Parkinson’s disease, and cancer.
“Vitamin D is a well-supported supplement, especially for those who are deficient, a condition affecting roughly 40% of Americans,” noted Hillary Lin, MD, a longevity-focused physician. However, she emphasizes that more research is needed in this area.
2. Protein Supplements
Older adults frequently face an increased risk of muscle loss, impacting mobility and independence. Studies indicate that integrating protein supplements with physical activity can aid older people in developing muscle mass. Furthermore, enhancing dietary protein intake, particularly from plant sources, correlates with a greater likelihood of healthy aging.
Lin points out that many individuals do not consume sufficient protein to sustain or build muscle mass. “Sarcopenia (the loss of muscle mass due to aging) is insidious and commences earlier than most expect.”
3. Omega-3 Fatty Acids
While evidence is somewhat limited, some clinical trials suggest that omega-3 fatty acids might reduce biological aging by up to four months, especially when used in conjunction with vitamin D and regular exercise. “Omega-3s are my go-to recommendation due to their anti-inflammatory properties and cardiovascular benefits,” stated Lin, adding that many people don’t get adequate amounts of omega-3s through their diet alone.
However, some research indicates that while fish oil has advantages for healthy aging, it does not appear to extend lifespan or confer additional longevity benefits.
4. Magnesium
Commonly found to be deficient in older populations, magnesium deficiency may elevate inflammation and free radical levels, which are linked to age-associated diseases and faster aging. Maintaining adequate magnesium levels through supplementation may support healthy aging. Although studies in animals have shown that magnesium intake can enhance longevity, this has yet to be established in humans.
Lin indicates that she frequently recommends magnesium supplements for certain patients due to their sound scientific basis, significant human data, and low-risk profiles.
Questionable Longevity Supplements
According to Pravin Date, MD, a primary care physician at Kaiser Permanente, some longevity supplements may be overstated. Despite having interesting mechanisms linked to longevity, the evidence supporting their human benefits remains inconclusive.
1. NMN and NAD+ Boosters
Research finds that nicotinamide adenine dinucleotide (NAD+) is essential for energy production, reducing oxidative stress, and safeguarding DNA. With age, NAD+ levels decrease, which is correlated with increased biological aging and related diseases. Some experts propose that boosting NAD+ levels with supplements like nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR) may decelerate aging. However, human studies are insufficient to verify their safety and benefits.
“Current human trials are limited in size and duration. I’m not suggesting they don’t work—we simply lack the evidence,” stated Lin.
2. Resveratrol
Found in grapes, red wine, and blueberries, resveratrol has been associated with various anti-aging effects, including extending health span and combating age-related diseases. Some evidence also suggests its potential for protecting against harmful UV effects, which can hasten aging and reduce wrinkles.
However, the majority of studies on resveratrol have been conducted in cells or animals, with insufficient research on its ability to enhance health span in humans. “Resveratrol has been disappointingly ineffective in human trials despite promising results in animal studies,” Lin remarked.
3. Berberine
Berberine is believed to enhance overall health by decreasing inflammation and regulating blood sugar and blood pressure. Although animal studies suggest it significantly promotes a healthy lifespan, there is scant evidence to support this effect in humans.
“Berberine exists in somewhat of a grey area. While it demonstrates metabolic benefits, I do not recommend it broadly to my patients,” Date suggested. Lin echoed this sentiment, noting that while there is compelling metabolic data supporting berberine, its low bioavailability and the varying quality of over-the-counter products could hinder its effectiveness.
4. Ashwagandha
In Ayurvedic medicine and various animal studies, ashwagandha has been linked to improved health span and supporting healthy aging. Yet, there is no evidence establishing its role in promoting longevity in humans.
“Ashwagandha presents a more nuanced profile among longevity supplements. While some short-term studies indicate its effects on cortisol and stress, comprehensive long-term safety data across diverse populations remains lacking,” Lin advised.
For those exploring longevity supplements, it’s essential to consult with healthcare professionals to weigh the potential benefits against possible risks. A tailored approach considering individual health contexts is vital for making informed decisions.
Read the original article on Health.
