Ingredients Wiki

A science-based catalog of active compounds used in testosterone boosters. Learn about their clinical efficacy, recommended dosages, and research ratings.

Supplement Directory

Browse our directory of the primary herbs, minerals, and amino acids studied for their ability to support testosterone synthesis, muscle growth, and performance.

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D-Aspartic Acid Hormone Support

D-Aspartic Acid (DAA)

Clinical Dose 2,000 - 2,352mg
Primary Target LH & Testosterone
Scientific Confidence 4.8/5

An amino acid regulator of testosterone synthesis. It stimulates Luteinizing Hormone (LH) in the brain, signaling the Leydig cells in the testes to increase natural testosterone production. Clinical trials show substantial increases in active free hormones within 12 days.

Clinical Findings

  • A landmark study published in Reproductive Biology and Endocrinology showed a 42% average increase in free testosterone after 12 days of daily 3.12g DAA supplementation.
  • Research in Journal of the International Society of Sports Nutrition suggests standard clinical 2-3g doses are optimal; resistance-trained men should avoid excess doses (6g+) to prevent feedback regulation.

Safety & Tolerability

Excellent safety profile at clinical doses. Minor side effects might include mild digestive discomfort if taken on an empty stomach. No hepatic or renal strain reported in literature.

KSM-66® Ashwagandha Stress & Focus

KSM-66® Ashwagandha

Clinical Dose 600 - 675mg
Primary Target Cortisol & Stress
Scientific Confidence 4.9/5

A premium, highly bioavailable root extract of Ashwagandha. It functions as an adaptogen to lower cortisol levels by up to 27%. Lowering cortisol directly prevents stress-induced testosterone drops.

Clinical Findings

  • A double-blind, randomized, placebo-controlled study published in the Indian Journal of Psychological Medicine demonstrated a 27.9% reduction in serum cortisol levels alongside significant improvements in stress assessment scales.
  • Research in the Journal of the International Society of Sports Nutrition showed that participants taking KSM-66® experienced a 16.7% increase in serum testosterone levels and significantly greater increases in muscle strength and recovery.

Safety & Tolerability

Excellent safety profile with no significant adverse events reported in clinical trials. As an adaptogen, it naturally supports somatic equilibrium. Individuals with nightshade sensitivities should use caution.

Zinc Vitamins & Minerals

Zinc (Citrate/Picolinate)

Clinical Dose 10 - 40mg
Primary Target Aromatase Inhibition
Scientific Confidence 4.7/5

An essential trace mineral that regulates immune function and hormone production. It acts as an aromatase inhibitor, blocking the conversion of active testosterone into estrogen, preventing severe hormonal drop-offs.

Clinical Findings

  • A classic study published in the journal Nutrition showed that restricting dietary zinc in healthy young men led to a 50% drop in serum testosterone after 20 weeks, while zinc supplementation in marginally zinc-deficient elderly men doubled testosterone levels.
  • Research on elite athletes demonstrated that zinc supplementation prevents the exercise-induced depletion of thyroid hormones and testosterone, preserving athletic performance capacity.

Safety & Tolerability

Extremely safe at standard dietary doses. Prolonged daily dosages exceeding 40-50mg should be balanced with small amounts of copper to prevent secondary copper deficiencies.

Vitamin D3 Vitamins & Minerals

Vitamin D3

Clinical Dose 2,000 - 4,000 IU
Primary Target Androgen Receptors
Scientific Confidence 4.8/5

A fat-soluble vitamin that acts as an endocrine hormone precursor. Essential for maintaining healthy testosterone levels, supporting muscle protein synthesis, bone density, and overall metabolic health.

Clinical Findings

  • A randomized controlled trial published in Hormone and Metabolic Research found that men receiving 3,332 IU of Vitamin D3 daily for a year experienced a significant increase in total testosterone (from 10.7 to 13.4 nmol/L) and free testosterone.
  • Cohort studies demonstrate a direct linear correlation between serum 25-hydroxyvitamin D levels and circulating bioactive testosterone levels in healthy males.

Safety & Tolerability

Extremely safe up to 10,000 IU daily. Periodic blood testing is recommended for long-term high-dose supplementation to verify optimal blood range (50-80 ng/mL) and avoid hypercalcemia.

Fenugreek Libido & Stamina

Fenugreek Extract

Clinical Dose 500 - 600mg
Primary Target SHBG Inhibition
Scientific Confidence 4.6/5

A traditional herb rich in furostanolic saponins. Clinical studies demonstrate fenugreek supports high libido, metabolic energy, fat-burning pathways, and helps maintain healthy free testosterone levels by inhibiting SHBG.

Clinical Findings

  • A clinical trial published in Phytotherapy Research showed that 600mg of Fenugreek extract daily for 6 weeks significantly improved sexual arousal, muscle strength, and self-reported energy levels in healthy men.
  • A double-blind study observed a significant increase in both free and total testosterone levels, along with reductions in body fat percentage, over an 8-week resistance training program.

Safety & Tolerability

Very well tolerated. A common, harmless side effect is a faint maple syrup odor in sweat or urine. Individuals with severe allergies to chickpeas or peanuts should exercise caution.

AstraGin® Absorption

AstraGin® Extract

Clinical Dose 50mg
Primary Target Nutrient Absorption
Scientific Confidence 4.5/5

A proprietary plant-derived compound composed of Astragalus and Panax Notoginseng. It is clinically proven to enhance the absorption of active amino acids, vitamins, and minerals in the gut, amplifying supplement potency.

Clinical Findings

  • Transporter research shows AstraGin® significantly upregulates absorption transporters like CAT1 (amino acids) and SGLT1 (glucose) by up to 50% to 200% in intestinal epithelial cells.
  • Intestinal health trials demonstrate that AstraGin® helps restore damaged microvilli and reduces gut wall inflammation, improving the physical absorption area for complex compounds.

Safety & Tolerability

GRAS (Generally Recognized as Safe) affirmed. Composed of natural astragalus and ginseng extracts, it has zero reported toxicities or adverse interactions at clinical dosage thresholds.

Korean Red Ginseng Libido & Stamina

Korean Red Ginseng

Clinical Dose 40 - 100mg
Primary Target Nitric Oxide & Flow
Scientific Confidence 4.5/5

A traditional root extract rich in ginsenosides. It supports nitric oxide levels and vascular health, improving physical circulation, reducing training fatigue, and supporting sexual drive and vitality.

Clinical Findings

  • A systematic review in the British Journal of Clinical Pharmacology concluded that red ginseng is effective in clinical trials for improving erectile function and sexual performance compared to placebo.
  • Studies on physical performance indicate that ginsenosides reduce muscle damage markers (like creatine kinase) and systemic oxidative stress after intense exercise.

Safety & Tolerability

Highly safe for long-term consumption. Since it possesses mild adaptogenic stimulant properties, individuals taking blood pressure or diabetic medications should consult a physician.

Nettle Leaf Extract Hormone Support

Nettle Leaf Extract

Clinical Dose 40 - 150mg
Primary Target SHBG Binding
Scientific Confidence 4.4/5

Contains compounds that bind to Sex Hormone-Binding Globulin (SHBG) in place of testosterone. By occupying SHBG binding sites, nettle leaf releases more active free testosterone into the circulation.

Clinical Findings

  • Research published in Journal of Herbal Pharmacotherapy indicates that stinging nettle lignans bind strongly to SHBG, inhibiting the binding of active testosterone to transport globulins, thereby raising free testosterone.
  • Clinical observations confirm that nettle leaf compounds possess mild 5-alpha-reductase inhibitory action, helping to regulate the conversion of testosterone into DHT, supporting prostate health.

Safety & Tolerability

Excellent safety history. It has a mild diuretic effect; ensure adequate daily hydration. Minor stomach upset occurs in less than 1% of clinical trial participants.

Magnesium & Boron Vitamins & Minerals

Magnesium & Boron

Clinical Dose Clinical Blends
Primary Target Free Testosterone
Scientific Confidence 4.6/5

Magnesium promotes muscle relaxation and energy production. Boron is a trace mineral that decreases SHBG levels and raises free testosterone, making this synergistic combination essential for cellular recovery.

Clinical Findings

  • A study in the Journal of Trace Elements in Medicine and Biology showed that daily supplementation of 10mg of Boron for just one week significantly increased free testosterone levels and decreased SHBG and estrogen.
  • Research on athletes taking Magnesium showed that supplementation increases both free and total testosterone levels, with greater benefits observed in active subjects.

Safety & Tolerability

Extremely high safety index. Excess magnesium can cause mild laxative effects if taken in isolation at extreme dosages. The formulated clinical amounts are safe and well-tolerated.

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