These foods contain high levels of D-aspartic acid, which promotes the production of testosterone in humans. Soybeans, lentils, almonds, salmon, shrimp, beef and eggs are all great sources of this compound. Garlic. Research has shown that garlic has a positive effect on testosterone levels. This ingredient is very easy to incorporate into your diet either by sprinkling garlic powder on your food or by including more garlic cloves when cooking.