Amino acid

D-Aspartic acid

Amino acid studied for testosterone support (weak evidence), hormone signaling. How it works, the dose and timing studied, what it interacts with, and the research behind the grade.

Grade C evidence early: mostly mechanism or small studies Also known as DAA
All compounds
Best for Testosterone support (weak evidence), Hormone signaling
Typical dose 2–3 g daily
Timing Morning; with or without food
Category Amino acid
How it works

What it is and the mechanism

An amino acid that accumulates in the pituitary and testes and may stimulate luteinizing hormone and testosterone release. Trial results are inconsistent, with some showing no benefit or even reduced testosterone in trained men.

Dose and timing

When and how much to take

The dose below reflects the range used in published research. Match the form alongside the milligrams. Set your own wake and bed times to map the timing onto your day.

Timing visualizer

When to take D-Aspartic acid

Dose: 2–3 g daily. Set your own wake and bed times to map the guidance onto your day.

12a6a12p6pDAY1 dose
8 amMorning. Take early in the day.

These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease.

Before you stack it

Interactions and cautions

Read these before combining this with other supplements or medication. The risk is rarely the headline, it is the interaction you did not check.

Interactions
  • Hormone therapies, theoretical interaction
Cautions
  • Evidence is weak and contradictory in trained individuals
  • Cycle use; long-term data are limited
Stacking

What pairs well, and what to keep apart

Derived from shared topics, complementary categories, and the interaction list. Introduce one compound at a time so you can tell what works.

Keep apart from

No direct compound conflicts derived. Still check the interactions list above against your medication.

Explore more

Compounds in the same topics

Often considered alongside this one. Each carries its own evidence grade.