If you want to support better metabolism try supplements. The one I found to be best is Pure Encapsulations Magnesium Glycinate for Metabolism. For example, this line of products is always free of wheat and gluten, shellacs, GMOs, and coatings. It took me a while to search for and find the best magnesium glycinate but it was worth the effort. I found that buying online is okay but only if you research the product thoroughly. If you are purchasing it for the first time I suggest going in-person to your local health food or vitamin store.
Ask for help in finding a pure magnesium glycinate supplement. Above all read the labels on all the products. Taking these supplements helps boost your metabolism. They also help enzymes form properly. Magnesium also helps other nutrients like B vitamins get through your system properly. B vitamins enhance the nervous system and ward off stress.
Once you find the brand Pure Encapsulations, use them for the other supplements that you take. In short, they are very careful about putting only the purest ingredients into their vitamins.