D-Aspartic acid is an amino acid your body makes in the pituitary gland and testes. It plays a part in hormone control, nudging the release of luteinizing hormone, which can spur testosterone production.
Men commonly take it to support healthy testosterone. Some research points to a temporary bump in levels, though evidence is mixed and long-term benefit remains unproven.
Powder and capsule forms are both available. Many divide the daily dose into multiple servings, taken on an empty stomach for better uptake. Taking it with food can ease stomach upset. Dosing varies by product, so follow the label.
Short-term use appears safe for most healthy adults. Long-term safety is unknown. Anyone with a hormone-sensitive concern, like prostate cancer, should be cautious. Pregnant or breastfeeding women should avoid it.