Oysters are a very healthy food choice - just as most other fish-products. Oysters are packed with zinc, magnesium, selenium, copper, and vitamin D. All of these vitamins and minerals are essential for building testosterone. Since oysters are a meat product, that means that they are also high in protein, and even feature a few rare amino-acids, that are not found in other, more common meat products. One of these rare amino-acids is the D-aspartic acid. If oysters are rare in your area, you can also try eating more sardines.