Glycine! Oh how I like thee and what was I doing when I avoided you - for the most part - as a vegetarian for 10 years (caveat: there is some glycine in plant food but not enough in plant food when dealing with a lot of stress). Glycine is important for feeling relaxed, getting better sleep, and creating a powerful antioxidant called glutathione. You can it in collagen, which is found in chicken skin or soup, bone broth, organ meat, and more. You can also buy collagen powder and put in a smoothie too. A product I like using because it taste great and comes from grassfed cows is called Vital proteins. If you want more information about glycine, you can search on my website for more reason why you want to use it and recipes that have a ton of glycine in it.