How to keep your skin looking younger and boost collagen production. You might not know what it is, but collagen production is key when it comes to keeping your skin looking young, plump and wrinkle-free. Get daily news by email. Collagen is a protein produced by our cells that helps âholdâ the skin together, keeping it looking younger and giving it firmness and elasticity. When weâre young, our skin stays plump and smooth because it constantly regenerates itself.
Where it's from: Flank steak is from the bottom abdominal area of the cow, so it contains a lot of hard-working muscles. The meat has a lot of tough fibers running through it and is fairly lean. It's a thicker, wider cut of meat than skirt steak.
Flank steak is a relatively lean cut of beef. For less than 165 calories, you can have a 3-ounce broiled flank steak. The biggest percentage of those calories, or 60 percent of calories, are from protein. This serving of flank steak has close to 100 calories from protein.