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
Best for
Ingredients (4)
Boron Citrate
100%Dose/day
200 mg
Target
3–6 mg
Form
Standard
Rhodiola Root Extract
100%Dose/day
772 mg
Target
144–400 mg
Form
Not listed
Ginkgo Leaf Extract
5%Dose/day
5.6 mg
Target
120–240 mg
Form
—
Calcium
50 mgTrace amount — not scored
Nutrition
Calories, macros & sodium.
- Sodium5 mg
- Total Carbohydrates1 Gram(s)
Other Ingredients (10)
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
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and 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. clinical 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.