Science
Tongkat Ali and Libido: What Human Research Shows
A cautious review of human Tongkat Ali studies that measured sexual-function outcomes, with material, population, and product-boundary limits for dried root tea.
Does Tongkat Ali increase libido? Some small human studies of defined Eurycoma longifolia-containing supplements measured sexual-function outcomes. Their materials, populations, and co-interventions vary, so they do not establish a libido effect for dried root tea or this specific product batch.
Direct answer
“Libido” is a subjective outcome influenced by physical health, mental health, relationship factors, sleep, medicines, hormones, pain, and expectations. A study of a specific supplement can answer a narrow question about that intervention and population. It cannot turn Tongkat Ali root tea into a treatment for low desire, erectile difficulty, infertility, or a hormone disorder.
Standardized extract study ≠ dried root tea ≠ this product batch.
What selected human studies measured
| Study | Year / source | Participants / design | Study material | Dose / duration | Outcome scope | Important limitation |
|---|---|---|---|---|---|---|
| Physta® + Polygonum minus trial | 2014 | 40–65-year-old men; randomized, double-blind, placebo-controlled study; 26 completed | A 300 mg combination containing proprietary freeze-dried water extract Physta® and Polygonum minus | 12 weeks | Questionnaires on sexual performance, erection hardness, satisfaction, mood, and quality of life | It tested a combination, not Tongkat Ali alone and not root tea. |
| ADAM trial | 2021 | 45 men with androgen deficiency of aging males; four-arm randomized, double-blind, placebo-controlled trial | E. longifolia supplement; extract specification not stated in the PubMed record reviewed | 200 mg; 6 months; concurrent-training arm included | International Index of Erectile Function, Aging Male Scale, total testosterone | Training and supplement were combined in the strongest-result arm; not a root-tea study. |
| Idiopathic male-infertility study | 2010 | Sub-fertile male partners; follow-up report | Proprietary standardized water-soluble root extract | 200 mg daily; follow-up every 3 months for 9 months | Semen parameters and pregnancies, not a direct libido outcome | 350 started; 75 completed one 3-month cycle. This is not evidence for tea or a libido treatment. |
What these studies do not show
They do not establish that our dried root slices:
- improve libido, erectile function, sexual satisfaction, or fertility;
- treat erectile dysfunction or any diagnosed condition;
- have a clinically validated sexual-health dose;
- work within a specified number of weeks;
- are equivalent to a studied extract or combination product; or
- are safe for every person or alongside medicines.
The published outcomes are also not interchangeable. A questionnaire score, a hormone laboratory value, semen parameter, erection-related outcome, and subjective desire measure are different endpoints.
Product and batch distinction
RedTongkatAliMY sells dried root slices for tea. We do not publish a batch-specific COA, DNA identification, eurycomanone concentration, or clinical trial of this batch. We therefore cannot connect a cup of tea to the intervention in any study above.
For an explanation of that evidence gap, see Root Slices vs Extract and Product Testing Status.
When medical assessment matters
Persistent changes in desire, erectile function, pain, fertility, mood, or energy can have many causes and may warrant clinical assessment. Do not use an herbal tea instead of evaluation for cardiovascular, endocrine, medication-related, mental-health, or relationship concerns.
People using medicines, people with hormone-sensitive conditions, and people who are pregnant, breastfeeding, or trying to conceive should seek qualified advice before use.
Sources and related questions
- Science Hub — parent research cluster
- Evidence Index — verified-source policy
- Tongkat Ali and Testosterone — hormone evidence boundaries
- Tongkat Ali and Drug Interactions — medicines and unknowns
- Tongkat Ali for Women — female evidence and safety limits
- Red Tongkat Ali Safety — broader safety context
Frequently Asked Questions
Scientific research and product-specific testing answer different questions. See Product Batch Testing.