Sarcopenia: Muscle Loss With Age and What You Can Do About It

Losing some muscle with age is common, but it is not inevitable, and it is far more changeable than most people think. When the loss of muscle strength and mass goes far enough to affect daily life, it has a name: sarcopenia. Here is what it is, how fast it happens and what actually helps.

What sarcopenia is

The European Working Group on Sarcopenia in Older People updated its definition in 2019. It describes sarcopenia as a muscle disease, or "muscle failure," rooted in adverse changes that build up across a lifetime. It is common in older adults but can begin earlier. The key change in the definition was a focus on strength: low muscle strength is the main warning sign, low muscle quantity or quality confirms the diagnosis, and poor physical performance marks severe sarcopenia.

How fast muscle and strength decline

A 2012 review pulled together decades of research on aging muscle. The numbers are worth knowing:

The most important finding: strength declines two to five times faster than muscle mass, and low strength is a more consistent predictor of disability and death than low muscle mass. That is why strength, not the mirror, is the thing to protect.

Warning signs

• Needing your arms to get up from a chair
• A weaker grip, or trouble opening jars
• Walking more slowly, or tiring on stairs
• Falls or near-falls
• Unplanned weight loss

Physicians screen for sarcopenia with simple tests such as grip strength, timed chair stands and walking speed, and can confirm it with a body composition scan.

What actually helps

• Resistance training. The most powerful tool at any age. In the LIFTMOR trial, women averaging 65 years old safely lifted heavy weights under supervision twice a week and improved strength and every functional test. Our post on strength training and bone density has the details.
• More protein than younger adults. The PROT-AGE study group recommends at least 1.0 to 1.2 g of protein per kilogram of body weight a day for adults over 65, at least 1.2 g for those who exercise, and 1.2 to 1.5 g for most older adults with acute or chronic illness. People with severe kidney disease are an exception and may need to limit protein.
• Protein at every meal. Older muscle responds less to small servings, so spread protein evenly across the day.
• Stay active between sessions. Walking, gardening and taking the stairs all keep muscles working.

Where PeptiStrong fits

PeptiStrong is a network of peptides made from fava bean protein, designed to support strength and endurance alongside resistance training. In a 2025 double-blind trial, 2.4 g a day for 56 days alongside training produced greater gains in leg strength and about 21.6 percent more improvement in muscular endurance than training with a placebo. The published PeptiStrong trials enrolled adults aged 19 to 45, so for older adults it is best viewed as a complement to the proven steps above, discussed with your physician. Our explainer, what is PeptiStrong, covers the research.

Who should check with a physician first

See your physician if you notice the warning signs above, especially falls or unplanned weight loss, which can have other causes. Ask before starting a new exercise program if you have heart, lung or joint conditions. Talk to your physician before using PeptiStrong if you have G6PD deficiency or a history of favism, a legume allergy, kidney disease or take prescription medication.

How Vita Bloom fits

Our PeptiStrong Muscle Peptides deliver 2.4 g of PeptiStrong® in four capsules a day, as the only active ingredient. Take them daily with water, alongside resistance training and enough protein, and give it at least eight weeks. Also see muscle loss during weight loss and GLP-1s.

Frequently asked questions

At what age does muscle loss start?

Gradual loss can begin in midlife and tends to speed up after about 65 to 75. Strength usually falls faster than muscle mass.

Can sarcopenia be reversed?

Strength and physical function can improve at any age with resistance training and enough protein. Talk to your physician about a plan that is safe for you.

What is the best exercise for sarcopenia?

Progressive resistance training that works the major muscle groups, ideally two or more times a week, plus balance work and daily activity.

How much protein do older adults need?

The PROT-AGE study group recommends at least 1.0 to 1.2 g per kilogram of body weight a day for adults over 65, and more for those who exercise or are ill, unless kidney disease requires a limit.

PeptiStrong® is a registered trademark of Nuritas Ltd. Vita Bloom Labs uses the branded ingredient and is not otherwise affiliated with Nuritas.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.