Amino Acid
D-Aspartic Acid (DAA)
Also known as: DAA, D-AA, D-Aspartate
Amino acid involved in testosterone synthesis, with mixed research results.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every D-Aspartic Acid (DAA) product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Nutricost D-Aspartic Acid Capsules | 86 A- | $0.38 |
| 2 | Nutricost Testosterone Complex Capsules | 84 A- | $0.57 |
| 3 | Pure Encapsulations Tribulus Formula | 84 A- | $1.47 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much D-Aspartic Acid (DAA) should I take?
The typical range is 2-3g daily. Cycle 2-3 weeks on, 1-2 weeks off
When should I take D-Aspartic Acid (DAA)?
Morning. Either way.
Which form of D-Aspartic Acid (DAA) is best?
Powder — Cost-effective. Other forms in the catalog: Capsules.
Is D-Aspartic Acid (DAA) safe?
Commonly reported: Irritability, Headache, Acne (some). Serious warnings: Results mixed in healthy men. Safe
Which D-Aspartic Acid (DAA) supplement scores highest?
Nutricost D-Aspartic Acid Capsules, at 86/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Testosterone synthesis
- LH stimulation
- Male fertility
How it works
- Stimulates LH release
- Involved in testosterone synthesis
- May help subfertile men
- Effects in healthy men unclear
Dosage
- Typical range
- 2-3g daily
- Timing
- Morning
- With food
- Either way
- Duration
- Cycle 2-3 weeks on, 1-2 weeks off
- Special populations
- Men with suboptimal fertility/testosterone
Forms
- Powder
- Capsules
Safety
Common side effects
- Irritability
- Headache
- Acne (some)
Contraindications
- None significant
Products containing D-Aspartic Acid (DAA)
Top-scoring supplements in our catalog that list D-Aspartic Acid (DAA) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Mixed results - may help subfertile men more than healthy men
Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.
Related in Amino Acid
Check a full stack
Formulate's free interaction checker lets you paste in any combination of supplements and medications at once — every pairing flags severity, timing, and cited evidence.
Open the checkerWhere does D-Aspartic Acid (DAA) fit in your stack?
Answer two questions and get a stack graded on research — every ingredient scored on the evidence behind it, not the marketing.
Build my stack2 questions · free · no account needed to start
Also on iPhone — get the free app
Evidence-based supplement guides, no spam
We send a short digest when new guides drop — nothing else. No affiliate pushes, no sponsored content, unsubscribe anytime.
Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.