Red Tongkat Ali Research References & Verification Limits
Public research reference hub for Red Tongkat Ali / Tongkat Ali: verified citations only, study cards, and clear limits on applying extract research to dried root slices.
August 14, 2026
What evidence applies to Red Tongkat Ali root slices? No published human clinical trial has tested this product batch. Most human Tongkat Ali research concerns standardized extracts, so it is indirect background—not proof of this tea’s identity, dose, composition, safety, or outcome.
Read this before interpreting a Tongkat Ali study
Most human Tongkat Ali research evaluates a standardized extract of Eurycoma longifolia at a measured dose. Red Tongkat Ali Malaysia sells whole dried root slices for tea under the Malaysian name Red Tongkat Ali / 红东革阿里.
Product boundary: standardized extract study ≠ dried root slice tea ≠ this product batch.
Full research map: What research says about Red Tongkat Ali. Naming: What is Red Tongkat Ali?. Documentation: What We Test.
Evidence types
- Government reference explains official botanical information, laboratory systems, or regulatory frameworks. It is not a product COA or approval.
- Scientific research describes the material, population, dose, and limits of a published study. Extract research does not automatically establish equivalent results for dried root slices.
- Product-specific testing concerns a named submitted sample or batch. We do not currently publish product-specific testing for our root slices; see Product Testing Status.
How we select citations
Priority order used on this site:
- Primary human research
- Systematic reviews / meta-analyses
- Controlled studies
- Animal research (background)
- In-vitro research (background)
- Traditional sources (not clinical proof)
Only DOI/PubMed IDs locked in our internal verification matrix are listed as verified below. Unverified percentage claims from secondary blogs are not treated as product proof.
Verified citations
Study card: Leisegang et al., 2022 (systematic review / meta-analysis)
| Field | Detail |
|---|---|
| Title / type | Systematic review and meta-analysis on Eurycoma longifolia and testosterone outcomes |
| Authors / year | Leisegang et al., 2022 |
| Journal | Medicina |
| Verified IDs | PubMed 36013514; DOI 10.3390/medicina58081047 |
| Study type | Systematic review / meta-analysis |
| Material | Primarily commercial / water extracts across included trials |
| Dose / duration | Varies by included trial — see paper |
| Population | Men in included human studies (heterogeneous) |
| Outcome scope | Authors discuss possible improvement in total testosterone; more research needed |
| Limitations | Heterogeneous products and doses; extract-dominant |
| Applicability to dried root slices | Indirect — not a dried-root-tea dose study; not our batch |
Study card: Ulbricht et al. (Natural Standard systematic review)
| Field | Detail |
|---|---|
| Verified ID | DOI 10.3109/19390211.2012.761467 |
| Material | Mixed literature |
| Root-slice relevance | Background only |
| Limits | Older review; not product-specific; does not replace batch documentation |
| Applicability to dried root slices | Background only |
Evidence topics on this site
| Topic | Page |
|---|---|
| Full A–F research map | Red Tongkat Ali research |
| Human studies overview | Human studies |
| Testosterone | Science: testosterone |
| Cortisol / stress | Science: cortisol |
| Eurycomanone marker | Science: eurycomanone |
| Safety | Safety guide |
| Root vs extract | Root vs extract |
What we do not list as verified product proof
Secondary marketing claims without a locked DOI/PubMed ID — including precise cortisol/testosterone percentage figures often repeated online — are not reproduced here as product evidence.
Product context
US buyers evaluating the physical root-slice format: Buy in the USA · Shop.