Cyclobenzaprine is a muscle relaxer that is available in generic form as well as under the brand names Flexeril and Amrix. It's considered a second-line treatment for fibromyalgia. This drug is a ...

Your metabolism tends to reach its peak in the first year of life, stays relatively stable in your 20s through 60s, and declines significantly after age 60, according to a 2021 study in Science.