Recent Blog Articles

Staying Healthy

The power of protein

August 01, 2020

Protein can help older men build and maintain muscle, but the amount and source matter.


Men gradually lose muscle mass as they grow older, a natural effect of aging called sarcopenia. During his lifetime, a man loses about 30% of his muscle mass. Yet older men can maintain and even regain muscle. It takes a combination of regular weight training and a proper diet, including adequate amounts of protein.

Protein is one of the three primary macronutrients, along with carbohydrates and fat. It consists of 20-plus amino acids, which help build and repair muscle fiber, which is why protein is often referred to as your muscles' building blocks.

To continue reading this article, you must log in.

Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.

  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise
Learn more about the many benefits and features of joining Harvard Health Online »

I'd like to receive access to Harvard Health Online for only $4.99 a month.

Sign Me Up

Already a member? Login ».


As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles. No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.