Like retinol or squalane, collagen is one of those skin-care buzzwords we know is good for us but aren't necessarily sure why. For starters, collagen is a protein our body naturally produces that's linked to healthy skin and connective tissues (FYI: the rate at which we make collagen decreases by one percent per year after age 30). Fret not, collagen aids have become très popular in the last few years, and we're about to break down the different ways you can use them to boost your collagen levels.—Vicki Duong
Protein is important in the body. Every single cell of your body contains protein so, I’d say it is a very, very important macronutrient. Protein is a team player and exists just about everywhere in the body. To start off, it is a component of each and every cell, it acts as the building blocks for bones, cartilage, muscles and contributes to hormones and other chemicals made in the body.