Could peanut butter be the secret to strengthening muscles in old age?
It may seem like falls and leg weakness are just part of “getting old.” But scientists are increasingly finding unexpected ways to slow this process down. One of them involves a product that many consider simply a tasty toast spread. A clinical study showed: ordinary peanut butter can improve muscle strength in older adults. This is especially important considering that muscles weaken with age. And all it takes is just a few spoonfuls a day.
Why Muscles Weaken With Age and Why It’s Dangerous
With age, muscles weaken, but muscle power — the ability to quickly generate force — declines even faster. It’s precisely this ability that helps you stay on your feet, quickly get up from a chair, or catch your balance — since even your gait says a lot about the state of your body.
Scientists from Deakin University in Australia conducted a randomized study involving 120 people over the age of 65. Half of the participants received approximately 43 grams of peanut butter daily — roughly three tablespoons — while the other half ate as usual, avoiding nuts.
After six months, interesting findings emerged:
- lower body muscle power increased;
- participants were able to get up from a chair faster;
- body mass and composition remained virtually unchanged.
Daily consumption of 43 g of peanut butter over 6 months improved results on the Five Times Sit-to-Stand test: completion time decreased by an average of 1.23 seconds, and estimated muscle power increased. However, walking speed, grip strength, and knee extensor strength did not change significantly.
In gerontology, this is considered a clinically significant improvement. Muscle power, which declines faster with age than endurance, is associated with the risk of falls and dependence on outside assistance.
According to the researchers, such changes increase the chances of maintaining independence in the future. Image source: kun.uz
What the Study Revealed About Peanut Butter and Muscles
In addition to the chair test, researchers recorded an increase in absolute muscle power of approximately 22 W and relative power of 0.27 W per kilogram of body weight.
Interestingly, at the same time:
- participants consumed approximately 250 extra calories per day;
- their diet included about 10 g more protein;
- yet body weight did not increase.
Scientists suggest this is related to the properties of nuts: some of their fats are simply not absorbed, and the body tends to use unsaturated fats as an energy source.
How Much Peanut Butter Should Older Adults Eat
The study does not mean that peanut butter is a cure for age-related weakness. But it can serve as a simple addition to healthy aging, especially when combined with physical activity — since it is known that physical exercise can restore the strength of aging muscles.
Helpful ideas:
- add 2–3 tablespoons of peanut butter per day;
- spread it on toast or add it to porridge;
- use it as a protein source between meals.
Another advantage is the soft texture, which is suitable for people who have difficulty chewing nuts. Most importantly, this product easily fits into everyday life.
Surprisingly, a simple jar of peanut butter may prove to be an ally in preserving strength and independence in old age.
