D-Aspartic Acid (DAA)
Vitality & sports performanceFunction & benefits
An isomer of aspartic acid concentrated in the pituitary gland and testes; studies suggest it stimulates luteinizing hormone (LH) release and may support testosterone synthesis in men with low levels, while its effect is temporary or absent in athletes with normal levels.
Dosage & how to use
| Recommended dose | 3 g daily |
| Best time to take | In the morning on an empty stomach with a glass of water |
| Frequency | In cycles: 12–14 days on, then a full 2–3-week break |
Best forms to choose
Pure D-aspartic acid powder, or formulas that combine it with zinc and vitamins B6, B12 and D3.
Important warnings
Sticking to on/off cycles is essential; continuous use for more than a month may lower hormone levels instead
Not for people under 18, women or pregnant women
Drug interactions
Safe with most medicines; do not combine it with testosterone replacement therapy (TRT) or oestrogen blockers.
Related supplements
- Whey ProteinMuscle building & fitness
- Casein ProteinMuscle building & fitness
- Creatine MonohydrateMuscle building & fitness
- BCAA (Branched-Chain Amino Acids)Muscle building & fitness
Scientific references
- Topo E et al. Reprod Biol Endocrinol 2009 — PMID: 19860889
Content last updated: 17 October 2026 · Based on published sources and research (EFSA / NIH / PubMed)
⚖️ Medical disclaimer: The information and data provided here are for health education and nutritional guidance only. They are not a medical diagnosis and never replace a direct consultation with your doctor or pharmacist. Always consult your doctor before starting any supplement, especially during pregnancy or breastfeeding or when taking long-term medication.