It seems like hardly a week goes by without hearing someone say, “My metabolism has slowed.” Whether it’s about struggling with weight loss or feeling constantly tired, metabolism often takes the blame.

Have you ever seen the word “soy lecithin” on the back of a food package? It’s a common ingredient, but many people don’t know what it is or why it’s there.

If you paid attention in biology class, you might remember hearing that the mitochondria is the “powerhouse of the cell.” But what does that really mean, and why does it matter for your health and weight loss?