Tongkat Ali
Tongkat Ali (Eurycoma longifolia) is an herbal supplement that Huberman takes for testosterone optimization. It works primarily by reducing SHBG, thereby increasing free testosterone.
How Tongkat Ali Works
Unlike synthetic testosterone, Tongkat Ali doesn’t add external hormones. Instead:
- Reduces SHBG (sex hormone-binding globulin)
- SHBG normally binds testosterone, making it inactive
- Less SHBG = more free testosterone available
- May also mildly support luteinizing hormone (LH)
The result: your body’s existing testosterone becomes more bioavailable.
Typical Dosage
| Timing | Dose |
|---|---|
| Morning | 400mg |
Huberman takes 400mg daily in the morning.
Benefits
| Benefit | Mechanism |
|---|---|
| Increased free testosterone | SHBG reduction |
| Improved libido | Testosterone availability |
| Enhanced energy | Hormonal optimization |
| Mood support | Testosterone’s effects on well-being |
What to Look For
Quality matters significantly:
| Factor | What to Check |
|---|---|
| Standardization | Eurycomanone content |
| Source | Malaysian preferred |
| Dose | 400mg is common |
| Purity | Third-party tested |
Low-quality extracts may be ineffective.
Cycling
Unlike Fadogia Agrestis, Tongkat Ali doesn’t require strict cycling:
- Can be taken daily long-term
- Some prefer 8 weeks on, 2 weeks off
- Monitor blood work periodically
Stack with Fadogia
Often combined with Fadogia Agrestis:
| Substance | Mechanism | Dose |
|---|---|---|
| Tongkat Ali | Frees existing testosterone | 400mg |
| Fadogia Agrestis | Stimulates production | 300-600mg |
The two work through different pathways and may be synergistic.
Cautions
- Get baseline testosterone blood work first
- Not for people with hormone-sensitive conditions
- May affect sleep in some (take in morning)
- Quality varies widely between brands
Who Benefits Most
- Men over 30 with suboptimal testosterone
- Those seeking natural testosterone support
- Athletes wanting hormonal optimization
- People noticing age-related testosterone decline