Why are Collagen Peptides and Vitamin K2 so important for youthful skin?

Collagen is a group of proteins mostly found in the bones of animals. It’s an abundant protein and building block that holds our structure together; such as our skin, tendons, ligaments, cartilage, and bones. As we age, the collagen in our bodies starts to  decline at a fast rate, leading to sagging skin & wrinkles, aching & stiff joints, and brittle bones. Vitamin K-2 (found in animal and fermented foods) can be further divided into MK-4 and MK-7. Seven different trials found that Vitamin K-2 reduced fractures by up to 81%. Also, it's noted that Asian cultures with diets high in fermented foods have much less visible signs of aging skin and osteoporosis. Unfortunately for most of us on a western diet, we are not getting enough of either of these valuable nutrients. Our ancestors primarily ate nose-to-tail (the whole animal), consuming large quantities of collagen and gelatin through bone broth. The Western diet consists mostly of muscle meats and vegetables, leaving us deficient in both Collagen and K-2.