Why fruits and vegetables may play a bigger role in strength

Healthy aging rarely comes down to one superfood. It usually comes down to consistent, balanced patterns and a diet that includes both protein and plenty of plants.

When we think about staying strong as we age, most of us zero in on protein. More chicken. More Greek yogurt. Maybe a protein shake just to cover the bases. Protein earns the spotlight, and for good reason. But muscle health is not a one nutrient story. Strength depends on more than what sits in the center of your plate. The foods filling the rest of it, especially fruits and vegetables, may be playing a bigger role in muscle health than we once thought.

Research published in the American Journal of Clinical Nutrition looked at adults over 65 and found that people who ate more potassium rich foods, mostly fruits and vegetables, had a higher percentage of lean body mass. Basically, they tended to carry more muscle relative to their body weight.

Why might that be?

Researchers proposed that diets heavy in meat and grains can create a higher dietary acid load. Your body tightly regulates blood pH, so this is not about becoming acidic. Instead, it reflects subtle differences in the metabolic byproducts of what we eat. Fruits and vegetables provide potassium and magnesium, which help buffer that load of extra dietary acid. Over time, a higher dietary acid load has been associated with greater muscle breakdown, particularly in older adults.

More recent research continues to support this pattern, too. In 2024, a study found that adults over 50 with higher dietary acid load tended to have lower grip strength, a simple but meaningful marker of muscle function and overall health.

None of this proves that eating more vegetables directly builds muscle. What it does suggest is that the overall pattern of your diet may influence how well you maintain muscle and function over time.

So what does that mean for your plate?

Keep prioritizing protein. But pair it with plants. Instead of asking only, “Did I hit my protein goal?” try also asking, “Did I add enough produce?”
Think eggs with sautéed spinach and fruit. Grilled chicken or tofu with roasted vegetables and a baked potato. Yogurt topped with berries and nuts. Beans stirred into salads or soups.

A practical goal is to fill about half your plate with fruits and vegetables at most meals. Prioritize potassium-rich foods such as leafy greens, beans, lentils, potatoes with skin, citrus, bananas, yogurt, and avocado.  If you’re looking for inspiration, our Loaded Banana Bread is a delicious way to add potassium and fiber to your day, without guilt.

Nutrition works best when paired with movement. Resistance training gives your body a reason to hold onto muscle, while adequate protein provides the building blocks needed for repair and growth. At the same time, a plant-rich eating pattern supplies antioxidants and phytonutrients to help create internal conditions that support good muscle maintenance.

Strong aging rarely comes down to one superfood or one supplement. More often, it reflects consistent, balanced habits that are practiced over time. A plate that includes both protein and a variety of fruits and vegetables is a smart and sustainable place to start.

Published March 1st, 2026