Is a higher dose always better?

No. Dose-fit rewards landing inside the range studied for the outcome — over-dosing (common with melatonin) or under-dosing both lower the score. The goal is the effective dose, not the biggest number.

What does the Value score mean?

The Value score compares a product's price per serving with clinically relevant products ranked for the same outcome. A score of 50 is the typical price; above 50 means better value than typical, while below 50 means the product costs more than typical. It is a 0–100 value signal, not a percentile.

Why is the cheapest product not #1?

Cost is only one input. The cheapest pick here is a citrate form with weaker absorption and a stock-risk flag, so it leads on Value-for-cost but trails on the composite that also weighs evidence, dose fit and availability.

Are these affiliate links?

Retailer links may be affiliate links and DoseRank may earn a commission. Rankings and placement are determined by the scoring model only — never by payment from a brand.

Is this medical advice?

No. DoseRank summarizes evidence to help you choose; it is not a substitute for a clinician, especially if you are pregnant, breastfeeding, on medication, or managing a health condition.

Increase free testosterone

What this outcome means

Free testosterone is the unbound, biologically active fraction of the hormone that your tissues can actually use. On DoseRank it maps to a defined health outcome built from human studies on free testosterone concentration, bioavailable hormone fraction, and sex-hormone-binding globulin levels – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Low energy and driveMen noticing flagging vitality, libido, or day-to-day motivation.

Midlife shiftsPeople tracking hormone changes that come with aging.

Bound-up hormoneThose whose total reads normal but active fraction runs low.

Stack buildersAlready taking supplements such as Tongkat Ali or Boron Citrate and want the dose right.

Evidence level

69Moderate-strong

Tongkat Ali – has moderate public evidence for this outcome. This usually means there are smaller or mechanistic studies, but not randomized human trials. A DoseFit Score of 83 means this product's ingredient forms and doses are close to what was used in the studies behind this ranking - DoseRank weights each product ingredient.

Best available ingredients

Tongkat Ali leads this outcome, supported by Boron Citrate.

Dose matchedDoseFit 83

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Tongkat Ali 100 mg vs 100-400 mg; Above range: Boron Citrate 200 mg vs 6-10 mg.

Thin spots

Boron Citrate has low evidence for this outcome, so it is flagged as an evidence gap rather than treated as a proven driver.

Processed

Available

Ingredients

Brands

187

Coverage

100%

How to read the scores

What every metric means

Each score is 0–100. Higher is better for every metric below.

CompositeThe overall DoseRank score — a weighted blend of clinical strength, evidence, dose fit, trust and value.Higher is better

ClinicalHow strongly the formula's ingredients and doses match what clinical studies used for this outcome.Higher is better

EvidenceHow much published human research backs the formula's key ingredients for this outcome — both how many studies exist and how strong they are.Higher is better

ValueHow the price per serving compares with similar products for this outcome — 50 is the typical price, higher means better value for your money.Higher is better

TrustHow well customers rate this product, with extra weight given to ratings backed by a large number of reviews.Higher is better

PopularityHow strongly this product sells compared with the other ranked products for this outcome.Higher is better

This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →

Not sure which is right for you?

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Take 60-sec quiz

Get a personal report

A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.

Questions

Frequently asked

Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.

Increase free testosterone

What this outcome means

Who it's for

Low energy and driveMen noticing flagging vitality, libido, or day-to-day motivation.

Midlife shiftsPeople tracking hormone changes that come with aging.

Bound-up hormoneThose whose total reads normal but active fraction runs low.

Stack buildersAlready taking supplements such as Tongkat Ali or Boron Citrate and want the dose right.

Evidence level

69Moderate-strong

Best available ingredients

Tongkat Ali leads this outcome, supported by Boron Citrate.

Dose matchedDoseFit 83

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Tongkat Ali 100 mg vs 100-400 mg; Above range: Boron Citrate 200 mg vs 6-10 mg.

Thin spots

Boron Citrate has low evidence for this outcome, so it is flagged as an evidence gap rather than treated as a proven driver.

Processed

Available

Ingredients

Brands

187

Coverage

100%

Relevant ingredients

Which ingredient types matter for free testosteroneOpen to see which ingredient types matter for free testosterone

874 products across 4 ingredient types — open to filter the ranking.

Use types to filter ranked products

Botanicals/Herbal Extracts

129 products

Concentrated plant and herbal extracts standardized to actives. Potency depends on the extract ratio and marker content, not raw weight.

Typical:

Antioxidants & Bioactive Compounds

125 products

Molecules that neutralize free radicals and tune cell signaling. Helpful in balance; mega-doses can blunt the body's own adaptive defenses.

Typical:

Minerals & Trace Elements

557 products

Inorganic nutrients from calcium to zinc. The chemical form drives absorption – chelates and citrates usually beat cheap oxides.

Typical: , , , ...

Sweeteners & Functional Sugars

63 products

Sugars and sugar-like compounds that sweeten or feed gut microbes. Ranges from table sugar to functional prebiotic sugars with little blood-sugar impact.

Typical:

Top decision cards

Best products for free testosterone

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for free testosterone

MuscleMeds, Vitamin T™, Testosterone Boosting Multi-Vitamin For Men, 90 Tablets

MuscleMeds$0.58 / serving4.7 · 174Available now

Also helps with

Antioxidant capacity

Immune function

Selenium status

Why this ranks here

Evidence fitTongkat Ali has moderate human evidence for this outcome.
Dose fit1 of 2 dosed ingredients land in the studied range. Tongkat Ali at 100 mg lands inside the studied 100-400 mg window.
Price / serving$0.58 per serving — mid price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustMixed trust signals — ratings are positive but the base is limited.

The numbers

100 mgIn rangeinside the studied 100-400 mg window

200 mgAbove rangehigher than the studied 6-10 mg window

100 mg

200 mg

40 mcg

225 mg

20 mg

10 mg

50 mcg

0.9 mg

75 mcg

30 mg

150 mcg

0.5 mg

50 mg

75 mg

900 mcg

25 mg

100 mcg

80 mcg

25 mg

200 mg

50 mcg

30 mg

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Nature's Truth, Longjack Tongkat Ali, 120 Quick Release Capsules (800 mg per Capsule)

Nature's TruthClinical89Dose fit96Popularity96$0.19/ serving

Solaray, Tongkat Ali, 400 mg, 60 VegCaps

SolarayClinical89Dose fit90Popularity99$0.23/ serving

Nutricost, Tongkat Ali, 120 Capsules

NutricostClinical89Dose fit94Popularity96$0.28/ serving

Swanson Vitamins, Tongkat Ali, 400 mg, 120 Vegan Capsules

Swanson VitaminsClinical89Dose fit93Popularity96$0.28/ serving

MuscleTech, AlphaTest™, 240 Capsules

MuscleTechClinical91Dose fit76Popularity50$0.26/ serving

Left Coast Performance, Boron Complex for Men With Tongkat Ali 200:1, 60 Capsules

Left Coast PerformanceClinical96Dose fit82Popularity30$0.30/ serving

EVLution Nutrition, Tongkat Ali Complex, 60 Veggie Capsules

EVLution NutritionClinical89Dose fit93Popularity84$0.34/ serving

Force Factor, Fundamentals, Longjack Tongkat Ali, 30 Capsules

Force FactorClinical89Dose fit91Popularity80$0.24/ serving

Seeking Health, Optimal Man™, 120 Capsules

Seeking HealthClinical96Dose fit74Popularity50$2.22/ serving