Most studies on muira puama have used doses between 500 mg and 1,500 mg per day, with the most commonly cited effective range being 1 to 1.5 grams daily. That said, no large-scale clinical trials have established an official recommended dose, so these numbers come from smaller human studies and animal research translated to human-equivalent doses.
Doses Used in Human Studies
The best dosage guidance comes from a handful of human studies, each using slightly different amounts. In a study of 262 men experiencing low sexual desire, participants took 1 to 1.5 grams of muira puama extract daily for two weeks. Sixty percent reported improved desire, and more than half of those who had trouble with erections rated the treatment as helpful. Some participants noticed effects within 24 hours, though the full study lasted two weeks.
A separate study looking at sexual function in 202 women used a combination of muira puama and ginkgo biloba. After supplementation, 65 percent of participants reported significant improvements across multiple measures: frequency of desire, satisfaction with their sex life, ability to reach orgasm, and intensity of orgasm. Because this was a combination product, it’s harder to isolate exactly how much muira puama alone contributed.
Another trial focused on erectile dysfunction used a combination supplement containing 500 mg of muira puama per day (split into two doses of two capsules), taken over three months. This is on the lower end of the range but was part of a multi-ingredient formula where the compounds were designed to work together.
How Dosage Varies by Form
Muira puama supplements come in several forms: raw bark or root powder, liquid tinctures, and concentrated extracts. The numbers above mostly refer to extracts, which are more concentrated than raw powder. If you’re taking a plain ground root powder rather than an extract, you may need a higher amount by weight to get the same active compounds. Unfortunately, research on standardized extract ratios (like 4:1 or 10:1 concentrates) is thin, so there’s no reliable conversion chart.
Your best bet is to check the supplement label for details on whether the product is a raw powder or a concentrated extract. If the label lists an extract ratio, a 4:1 extract at 500 mg would theoretically deliver the equivalent of 2,000 mg of raw material. Most products on the market fall somewhere in the 500 to 1,500 mg range per daily serving, which aligns with the doses used in research.
How It Works in the Body
Muira puama appears to work through several pathways in the nervous system rather than a single mechanism. Research on the plant’s extract shows it inhibits an enzyme that breaks down acetylcholine, a chemical messenger involved in arousal, attention, and memory. It also interacts with dopamine receptors and serotonin receptors, both of which play roles in mood, motivation, and sexual response. This multi-pathway activity helps explain why the plant has been studied for both sexual function and cognitive performance.
Animal research has also explored muira puama at a human-equivalent dose of 500 mg per day (for a 70 kg person) as part of a combination with ginger, guarana, and an amino acid. That study found the combination helped reverse age-related changes in smooth muscle tissue relevant to erectile function. While animal studies don’t translate directly to humans, the 500 mg dose used here is consistent with the lower end of human trial dosing.
What to Know About Safety
There are no well-documented serious side effects from muira puama at the doses used in studies. However, the safety data is limited precisely because the clinical trials have been small and short. No upper tolerable limit has been formally established. The longest human study ran for three months at 500 mg per day with no reported adverse effects, but that doesn’t tell us much about higher doses or longer use.
Because the plant interacts with multiple neurotransmitter systems, including serotonin and dopamine pathways, there’s a theoretical possibility of interactions with medications that affect these same systems, such as antidepressants or drugs for Parkinson’s disease. If you take any medication that alters brain chemistry, that’s worth a conversation with your pharmacist or doctor before adding muira puama.
A Practical Starting Point
Given the available evidence, starting at 500 mg per day of a muira puama extract and working up to 1,000 to 1,500 mg daily is the approach most consistent with research. The studies focused on sexual function generally used the higher end of that range (1 to 1.5 grams), while combination products used the lower end (500 mg). Effects on desire and arousal may appear within days, but most studies ran for at least two weeks before measuring outcomes, so giving it a couple of weeks is reasonable before deciding if it’s working for you.