Despite the name, the strongest ingredient here isn't a testosterone booster — it's **Rhodiola Root Extract** at 386mg per serving, standardized for salidrosides. That puts you right within the 144–400mg clinical range studied for reducing stress-related fatigue and supporting mental performance under pressure. At the label's recommended two servings daily, you'd be at 772mg, well above the studied range.

**Boron Citrate** at 100mg supplies roughly 5mg of elemental boron — squarely in the 3–6mg range linked to supporting bone metabolism and, in limited research, healthy hormone levels. The testosterone connection comes from a single 1987 study in postmenopausal women on boron-depleted diets, so the "testosterone booster" claim is a stretch for most people.

**Ginkgo Leaf Extract** is listed at just 2.8mg — clinical studies use 120–240mg daily. At roughly 1% of the studied dose, it's not contributing meaningfully to this formula.

BioStacks
Six Star

Testosterone Booster

Other · 2 Caplets × 2/day · 30 servings

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What it does

The label contains a blend whose composition is not fully confirmed.

Anti-Catabolic Complex

Mixed formsGrade —

Label lists Anti-Catabolic Complex. Benefit information is limited.

Calcium

Form not confirmedGrade —

Label lists Calcium (50 mg). Benefit information is limited.

Hormones
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Ingredients (4)

Calcium

50 mg

Trace amount — not scored

Nutrition

Calories, macros & sodium.

  • Sodium5 mg
  • Total Carbohydrates1 Gram(s)

Other ingredients

TalcAnti-caking

IARC classifies cosmetic-grade talc not containing asbestos as Group 2B (possibly carcinogenic to humans); perineal talc use as Group 2A (probably carcinogenic). Johnson & Johnson voluntarily withdrew talc-based baby powder from US/Canada in 2020 and globally in 2022 after extensive litigation tied to ovarian-cancer and mesothelioma cases. The 2018 FDA contamination survey found asbestos in 9 of 52 cosmetic talc products tested. As a supplement excipient talc is a pure manufacturing convenience — no nutritional or functional benefit to the user — so the asbestos-exposure risk has no offsetting upside. Safer alternatives (silicon dioxide, microcrystalline cellulose, rice hulls) are widely available.

Titanium DioxideColorant

Banned in the EU (2022) over concerns that its ultra-fine particles may damage DNA in gut cells. Still allowed in the US. Used only for white coloring — provides no health benefit.

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Polyethylene Glycol (Coating)Coating

A polyether polymer used as a tablet coating and plasticizer

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Croscarmellose SodiumDisintegrant

Cross-linked cellulose derivative used as a superdisintegrant

CrospovidoneDisintegrant

Cross-linked synthetic polymer used as a tablet disintegrant to help tablets break apart quickly in the stomach

Dicalcium PhosphateBinder

Calcium and phosphorus compound used as binder

Lab testing

How to take it

On an empty stomach
Label directs 2 servings — keep one for the morning

On the label

Directions: Take 1 serving (2 caplets) with a glass of water 2 times daily. Do not exceed 4 caplets in a 24-hour period. Read the entire label before use and follow directions provided.

Price check

$10.61

$10$20$50

Cheaper than 99% of 49 hormones supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

Not medical advice. Consult your healthcare professional.

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