You've probably heard that, as we age, our muscles break down, and it becomes harder and harder to maintain strength. Sarcopenia, or age-related muscle loss, typically begins in one's 40s. With each decade, a person can expect to lose 3-5% of their total muscle mass unless measures are taken.
Weight bearing exercises (lifting weights and resistance training) can certainly help to offset muscle wasting. Intake of protein is also essential as our muscles need protein for growth and repair. Unfortunately, with age, we tend to want to eat less protein. On average, elderly people consume 12-24% less protein. This may be because protein is more difficult to digest. Hydrochloric acid secretion tends to decrease with age as well, adding to the problem with digestion.
Enter bone broth. Bone broth is so easy on the GI tract. In addition, it is chock full of amino acids that replenish the protein in muscles, aiding in muscle retention. One amino acid, glutamine, is responsible for building muscle. Another, called proline, is known to prevent muscle mass atrophy.
Source : https://healdove.com/alternative-medicine/How-Bone-Broth-Reverses-the-Aging-Process