Huberman Natural T Stack
Risk: LowAndrew Huberman's drug-free testosterone optimization stack — tongkat ali raises free T by lowering SHBG, fadogia agrestis raises LH and total T, ashwagandha lowers cortisol (which competes with T), and boron further reduces SHBG and modulates estrogen. Four distinct mechanisms for natural HPTA support.
Composition: 4 Supplements
Overview
The Huberman Natural T Stack is the go-to drug-free test-optimization protocol for guys who want every angle of HPTA support covered: more total and free T, crushed SHBG, down-shifted cortisol, and better estrogen management — all with clinically-backed OTC inputs. This stack is laser-focused on men running natty, post-PCT, or those trying to wring every last drop from their endogenous production without tipping into suppression territory. It's not for TRT users (you're already maxed by definition), and it's not for anyone looking to shortcut hard training or lifestyle basics. The stack is real: bloodwork shifts, noticeable libido/drive and recovery benefits, and an extremely tolerable side effect profile by PED standards. Consider it a full-spectrum HPTA tune-up that you can run year-round or cycle in on your natty blocks.
Why this stack works
Every compound here has a distinct and complementary mechanism:
- Tongkat Ali: Lifts both total and free testosterone, reliably drops cortisol, and raises subjective libido/sexual function. Clinical data is strongest here — it's the workhorse of the stack.
- Fadogia Agrestis: Directly drives LH (and by extension, testicular T production) – in theory. All the evidence is in rats, but it does seem to synergize with tongkat in practice. Huberman's 8-on/2-off pattern is respected because of toxicity data in animals.
- Ashwagandha: Your cortisol control and HPA reset lever. Indirect T boost, excellent for stress and sleep, and stacks perfectly with the other two for lowering systemic stress. KSM-66 (or another standardized high-withanolide extract) is mandatory.
- Boron: Lowers SHBG (free T goes up), quietly reduces estradiol, and gives you a small but real boost in bioavailable T. 10 mg/day is a sweet spot. Not suppressive, no requirement to cycle.
Stacking these targets every chokepoint in natural T production and bioavailability. Tongkat and ashwagandha handle stress and baseline T, Fadogia pushes the axis harder, and boron fine-tunes free T and E2. When these overlap, users see the strongest free T and subjective benefit.
Protocol timeline
1 phase · 12 weeks total
Timeline shows the 12-week cycle. Bars overlap when phases run concurrently. Click a bar to jump to its detail card.
Cycle starts
2025
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
2026
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
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2027
Jan
Feb
Mar
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Dec
| Week | Compound | Dose | Frequency | Notes |
|---|---|---|---|---|
| 1-12 | Tongkat Ali | 400 mg | Daily | Use a standardized extract (e.g., Physta, LJ100); take in AM with or without food. |
| 1-8 | Fadogia Agrestis | 600 mg | Daily | 8 weeks on, then 2 weeks off per Huberman protocol. Always co-run with tongkat. |
| 9-12 | Fadogia Agrestis | 0 (off) | — | Take a 2-week break before resuming as needed. |
| 1-12 | Ashwagandha (KSM-66) | 600 mg | Daily | Split AM/PM or take all at once. Use KSM-66 or another standardized extract. |
| 1-12 | Boron | 10 mg | Daily | Boron glycinate or calcium fructoborate preferred. Take with food. |
- Fadogia Agrestis: Do NOT exceed 8 consecutive weeks without a 2-wk break; animal data shows testicular toxicity at unbroken higher runs.
- Tongkat Ali & Ashwagandha: Users sensitive to lowered cortisol (chronic fatigue, cortisol dysregulation) should watch for too-low stress response — consider halving ashwagandha or pulsing 5 days on/2 off.
- Boron: If stacking with high-dose vitamin D, monitor for hypercalcemia (rare but possible). Do NOT use boron if you have chronic kidney issues.
- Tongkat & Fadogia: Both may mildly increase libido and morning wood within 2–3 weeks; expect fullest subjective benefit by week 6–8.
- Bloodwork: Pull TT, FT, SHBG, E2 at baseline and after week 8 or 12 to quantify impact. If ALT/AST drift, pull both Fadogia and ashwagandha until normalized.
Compounds in this stack
4 linked · tap for full guide
Boron
Ultratrace Mineral / SHBG Modulator
Fadogia Agrestis
Natural Testosterone Support Herb
Tongkat Ali
Steroidogenic Botanical
Ashwagandha
Adaptogen / HPA-axis Modulator
How they work together
Multipliers applied to the projection above when these compounds run together. Values > 1 indicate a bonus, < 1 a penalty.
| Pair | Type | Lean | Fat loss | Recovery |
|---|---|---|---|---|
| synergistic | ×1.15 | ×1.05 | ×1.18 | |
| synergistic | ×1.15 | ×1.05 | ×1.10 | |
| synergistic | ×1.12 | ×1.10 | ×1.20 | |
| synergistic | ×1.15 | ×1.05 | ×1.12 |
Cycle outcome projection
Projection across all phases (12 weeks total) using the same math as the stack-calculator tool. Adjust gender, cycle length, and goal to see how the numbers move.
Body Transformation Preview
Lean Mass Gain
2.6 lbs
2.0–3.3 lbs range
Fat Loss
0.0 lbs
0.0–0.0 lbs range
Lean Synergy Bonus
+70%
from compound pairing
Fat Loss Synergy
+27%
from compound pairing
Per-Compound Contribution
Lean Gain by Week
Conclusion
If you're not ready or interested in pinning orals or AAS, this stack is the highest-upside, lowest-risk path to meaningfully improved testosterone and subjective quality of life. Get bloods before and after (TT, FT, SHBG, E2, LH, FSH, lipids), stick to name-brand/standardized extracts, and run it for a proper 8–12 weeks before judging efficacy.
Updated 2026-04-19