Top 7 Best Ways To Increase Testosterone (2026)
Natural ways to raise testosterone — from clinically dosed adaptogens to sleep, training, and lifestyle protocols that actually move serum T.
Ranked Solutions
Ranked by how much each one actually moves the needle — our SAC Efficacy Score™, explained further down.
#1Tongkat Ali
Supplement+10–15% free testosterone in stressed and older men over 8+ weeks
⚑ strongest in stressed or aging men- Effect size45%Large
- Evidence40%Strong
- Reliability15%Works for many
Strongest human-trial evidence for free-T uplift in stressed and aging men. 200-400 mg/day of standardised extract for 8+ weeks.
Founder's Pickpersonal experienceThe testosterone bump is subtle — but the libido kick is what you actually feel. That part is not subtle.
FelixFounder, Super Achiever Club 
#2Ashwagandha (KSM-66)
Supplement~15% testosterone rise, indirectly via cortisol reduction in stressed men
⚑ mainly chronically stressed men- Effect size45%Moderate
- Evidence40%Strong
- Reliability15%Works for many
Lowers cortisol, indirectly raises T. Best for chronically stressed men sleeping poorly. 600 mg/day KSM-66 for 8 weeks.
#3Zinc (for testosterone)
Supplementrestores testosterone in deficient men (Prasad 1996); little effect once replete
⚑ only if deficient- Effect size45%Moderate
- Evidence40%Strong
- Reliability15%Specific cases
The micronutrient most directly tied to T production — correcting a deficiency restores testosterone (Prasad 1996), but it does little once you are replete. A deficiency-correction list, not a booster.
#4Vitamin D3
Supplementmodest rise when correcting a real deficiency; mixed results in already-replete men
⚑ only if deficient or low on sun- Effect size45%Modest
- Evidence40%Moderate
- Reliability15%Specific cases
Low D = low T, plain and simple. 4,000-5,000 IU/day with K2 for any man not getting 20+ minutes of midday sun.
#5Shilajit
Supplement≈20% total-T rise in one 90-day RCT of men 45–55 (Pandit 2016); needs replication
⚑ small evidence base; buy purified, lab-tested resin only- Effect size45%Modest
- Evidence40%Limited
- Reliability15%Narrow
Mineral pitch (fulvic acid + dibenzo-α-pyrones) nudged total and free testosterone in one small RCT of older men. Promising but thin — and only worth it lab-tested, given the category's real heavy-metal risk.
#6Cistanche
Supplementsteroidogenesis effects shown in rats; human testosterone data essentially absent
⚑ unproven in humans- Effect size45%Small
- Evidence40%Preliminary
- Reliability15%Narrow
A trending T/vitality adaptogen — but the testosterone data is rat-level, with almost no human trials. Standardisation to echinacoside is the only real quality lever.
#7Horny Goat Weed (Epimedium)
Supplementno human evidence for raising testosterone; best human RCT is for bone density (Zhang 2007)
⚑ traditional use; T claims unproven- Effect size45%Small
- Evidence40%Preliminary
- Reliability15%Narrow
Marketed for male vitality, but its only solid human RCT evidence is for BONE density, not testosterone — treat the T/libido angle as traditional and unproven.
Average male testosterone has fallen ~1% per year since the 1980s. Most men under 35 today carry the T-levels of men in their 60s a generation ago — and that bleeds into energy, muscle, libido, mood, and recovery.
- −22%drop in average male T since 1987JCEM, Travison 2007
- 63%of men aged 25-40 carry suboptimal free-TT Trials, 2024 meta
- +143ng/dL serum T uplift from Tongkat Ali (200 mg/d, 8 weeks)PMID 36013514
- −27%cortisol drop with KSM-66 Ashwagandha 600 mg/d, 8 wkChandrasekhar 2012
Our methodology
How every score on this page is calculated — transparent and free to cite.
Best-Of Buyer Guides
Curated product roundups for testosterone — every pick tested for evidence, quality, and price-per-active-mg.
9 Best Testosterone Boosters
The testosterone boosters with real human-trial evidence — ranked across tongkat ali, ashwagandha, vitamin D, zinc and shilajit, not proprietary blends.
10 Best Tongkat Ali Supplements
Ten tongkat ali brands ranked by extract standardisation, third-party testing, and price-per-mg of active eurycomanone.
Best Zinc for Testosterone
Zinc only raises testosterone in deficient men (Prasad 1996: 30 mg/day ~doubled T) — ranked by the trial 30 mg dose, bioavailable form (picolinate/bisglycinate), and copper balance.
Best Vitamin D for Testosterone
Vitamin D lifts testosterone mainly in deficient men (Pilz 2011: 3,332 IU/day, +25% T over 12 months) — ranked by D3 form, the 3,000-5,000 IU correction dose, and K2 + magnesium cofactors.
Best Ashwagandha for Testosterone
The ashwagandha extracts with the strongest evidence for free-T support — KSM-66 leaders ranked by trial data and quality markers.
Best Horny Goat Weed Supplements
The 9 best horny goat weed (epimedium) supplements ranked by icariin standardisation, extract dose, purity and value — framed honestly as a traditional vitality tonic (icariin is a PDE5 inhibitor in vitro), not a proven ED treatment.
Best Cistanche
The 9 best cistanche supplements ranked on standardization to echinacoside % and verbascoside, extract ratio and potency, third-party testing and value — with the honest frame that human evidence is limited and early (mostly preclinical), so a verified standardized extract is the decisive axis, not testosterone hype.
Best Shilajit
The 9 best shilajit products ranked by purity & source transparency, form & dose honesty, safety disclosure, value and real-world use — with the category's documented heavy-metal risk as the honest spine: no listing publishes a metals panel, so no pick scores in the 9s.
Head-to-Head Comparisons
Stuck between two options for testosterone? These comparisons break down what wins where and why.
Ashwagandha vs Tongkat Ali
Head-to-head on T support, stress recovery, side effects, and stacking — when each one wins.
Tongkat Ali vs TRT
When does a herbal protocol replace TRT, when doesn't it — clinical-trial reality vs marketing claims.
Tongkat Ali vs Common Testosterone Boosters
Tongkat Ali head-to-head against the rest of the testosterone-booster category — what beats what, by what margin.
Tongkat Ali vs Fenugreek
Two testosterone classics compared on serum T effect, libido, side effects, and quality of evidence.
Tongkat Ali vs LJ100
Generic tongkat ali vs the LJ100 standardised extract — same herb, two quality tiers. Is the patented, assayed grade worth the premium? What the trials that ran on each actually show.
Tongkat Ali vs Yohimbe
Two very different tools: tongkat raises testosterone with a clean safety record; yohimbine is a higher-risk adrenergic for acute ED or a fat-loss cut. Which fits your goal — and where the safety line is.
Tongkat Ali vs Shilajit
Tongkat ali's direct testosterone lever vs shilajit's mineral/energy resin — what the trials show, and why they stack.
Tongkat Ali vs Fadogia Agrestis
The podcast-hyped pairing, honestly: tongkat's 10+ human RCTs vs fadogia's rat-only data and testicular-toxicity signal.
Shilajit vs Ashwagandha
Mineral resin vs adaptogen — ashwagandha's broad evidence base against shilajit's fulvic-acid energy + purity caveats.
KSM-66 vs Sensoril
The two dominant standardised ashwagandha extracts compared — root-only KSM-66 vs root+leaf Sensoril, and which to buy.
Tongkat Ali vs Tribulus Terrestris
The OG testosterone booster vs the new evidence-based contender — what the trials actually show.
How to increase testosterone naturally
Before any supplement, the four levers with the strongest human evidence are behavioural — and they set the ceiling everything else works within. Fix these first, then add a validated single ingredient and measure whether it moved your numbers.
- 1
Get your levels tested first
You cannot fix what you have not measured. Get a morning (before 10am) total + free testosterone panel, plus SHBG, 25(OH)D and serum zinc. Two of the most popular supplements only work if you are actually deficient — the blood test tells you which lever is even worth pulling. See our normal-range-by-age chart to read the result.
- 2
Sleep 7–9 hours — it is the biggest free lever
Testosterone is made largely during sleep; a single week of 5-hour nights cut daytime testosterone 10–15% in healthy young men (Leproult 2011, JAMA). No supplement out-earns fixing your sleep.
- 3
Lift heavy and keep bodyfat in check
Resistance training acutely raises testosterone, and carrying excess bodyfat lowers it (aromatase converts T to oestrogen in fat tissue). Losing meaningful weight if you are overweight is one of the most reliable ways to raise your own T.
- 4
Correct nutrient gaps (zinc, vitamin D, magnesium)
Zinc and vitamin D are cofactors for testosterone production — correcting a real deficiency restores T, but doing little once you are replete (Prasad 1996; Pilz 2011). Whole-food sources and honest food framing are covered in our testosterone-foods guide.
- 5
Add ONE validated supplement, then re-test
Tongkat Ali and KSM-66 ashwagandha have the only repeatable human free-testosterone evidence. Run one at the trial dose for 8 weeks, then re-test — keep it only if the number actually moved. Skip proprietary 'test-booster' blends: they are these same ingredients, underdosed and marked up.
Frequently asked questions
What is a normal testosterone level for my age?
Total testosterone in healthy young men typically runs roughly 300–900 ng/dL, and average levels decline about 1% per year after age 30. Because assays and reference ranges vary, always read your result against your own lab's range and a morning draw — see our testosterone-levels-by-age chart for the decade-by-decade picture.
Do testosterone booster supplements actually work?
A small number of single ingredients do: Tongkat Ali and KSM-66 ashwagandha have repeatable human-trial evidence for raising free testosterone, and zinc + vitamin D restore T when you are deficient. Most branded 'test-booster' blends (Nugenix, TestoFuel, Prime Male) bury below-trial doses of those same ingredients in proprietary blends at 2–4× the price — buy the validated single ingredient instead.
How can I increase testosterone naturally without supplements?
Sleep 7–9 hours, lift heavy 3–4×/week, keep bodyfat in a healthy range, and fix nutrient gaps (zinc, vitamin D, magnesium) through food. These behavioural levers have the strongest evidence and set the ceiling any supplement works within.
How long does it take to raise testosterone?
Lifestyle changes (sleep, training, fat loss) can shift levels over 4–12 weeks. Supplement trials for tongkat ali and ashwagandha run 8 weeks before a measurable serum change. The honest protocol is: change one variable, hold it 8 weeks, then re-test.
What are the symptoms of low testosterone?
The more specific signs are low libido, fewer morning erections, and unexplained loss of muscle or drive; less specific ones include fatigue, low mood, and higher bodyfat. Because these overlap with many conditions, a morning blood test is the only way to confirm it — see our low-testosterone-symptoms guide.
Research & sources
The key human trials behind the rankings above — every PMID verified against its primary source.
- Tongkat AliTalbott 2013 — Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects · Journal of the International Society of Sports Nutrition · PMID 23705671
- Tongkat AliTambi 2012 — Standardised water-soluble extract of Eurycoma longifolia, Tongkat Ali, as testosterone booster for managing men with late-onset hypogonadism · Andrologia · PMID 21671978
- Ashwagandha (KSM-66)Lopresti 2019 (testosterone) — A randomized, double-blind, placebo-controlled, crossover study examining the hormonal and vitality effects of ashwagandha (Withania somnifera) in aging, overweight males · American Journal of Men's Health · PMID 30854916
- Ashwagandha (KSM-66)Lopresti 2019 (stress + sleep) — An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: a randomized, double-blind, placebo-controlled study · Medicine (Baltimore) · PMID 31517876
- Zinc (for testosterone)Prasad 1996 (testosterone) — Zinc status and serum testosterone levels of healthy adults · Nutrition · PMID 8875519
- Zinc (for testosterone)Hemilä 2017 (cold meta-analysis) — Zinc lozenges and the common cold: a meta-analysis comparing zinc acetate and zinc gluconate, and the role of zinc dosage · JRSM Open · PMID 28515951
- Vitamin D3Holick 2007 — Vitamin D deficiency · New England Journal of Medicine · PMID 17634462
- Vitamin D3Pludowski 2018 — Vitamin D supplementation guidelines · Journal of Steroid Biochemistry and Molecular Biology · PMID 29080635
- ShilajitPandit 2016 (testosterone RCT) — Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers · Andrologia · PMID 26395129
- ShilajitKeller 2019 (fatigue/strength RCT) — The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels · Journal of the International Society of Sports Nutrition · PMID 30728074