D-aspartic acid works in your central brain region to cause a release of hormones, such as luteinising hormone, follicle-stimulating hormone, and growth hormone. It may also build up in the testicles, where it alleviates a rate-limiting step of testosterone synthesis, which leads to a minor testosterone increase. Our D-aspartic acid capsules are nothing short of amazing. pullulan capsules shells are used making these amazing capsules vegan & vegetarian friendly. Each capsule contains 750mg of goodness.