Transparent Labs VitalityvsTestoFuel

Vitality does not contain testosterone; instead it stacks plant extracts and minerals thought to support the body's own production. KSM-66 ashwagandha is an adaptogen that may lower cortisol and stress signaling, which can indirectly favor testosterone. Tongkat ali (Eurycoma longifolia, LJ100) is theorized to free up bound testosterone and support luteinizing hormone. PrimaVie shilajit and its fulvic acid have been associated with higher total and free testosterone in one trial. Zinc and boron are cofactors involved in testosterone metabolism, while DIM and quercetin are included to support estrogen metabolism, and BioPerine (black pepper extract) is added to improve absorption of the other ingredients. Note these are proposed mechanisms from individual-ingredient research, not effects demonstrated for the combined product.

TestoFuel doesn't add testosterone; it supplies the raw materials and signals involved in making it. D-aspartic acid is an amino acid linked to luteinizing-hormone release; vitamin D, zinc, and magnesium are cofactors the body needs for normal testosterone synthesis. The logic is repletion — correcting shortfalls so the hormonal machinery runs normally — which is why benefits are most plausible when you're deficient to begin with.

Evidence is for the individual ingredients at these doses, not the finished blend (no published trial tests Vitality itself). In Pandit et al. 2016 (Andrologia), 250 mg of PrimaVie shilajit twice daily for 90 days raised total testosterone about 20%, free testosterone about 19%, and DHEA-S about 31% versus placebo in healthy men aged 45-55. A 2022 systematic review and meta-analysis in Medicina (Leisegang et al.) found Eurycoma longifolia significantly increased serum total testosterone across randomized trials (a large but statistically heterogeneous pooled effect), with benefits noted in both healthy and hypogonadal men. An ashwagandha trial in aging, overweight men aged 40-70 (Lopresti et al. 2019, American Journal of Men's Health, using a 21 mg/day withanolide-glycoside extract) found a 14.7% greater rise in salivary testosterone and an 18% greater rise in DHEA-S versus placebo, though it found no significant improvement in fatigue, vigor, or sexual well-being. Real-world results are modest and highly individual; some users report energy or libido benefits, others little change.

The strongest evidence behind TestoFuel's formula is for correcting deficiencies: meta-analyses suggest vitamin D supplementation can modestly raise total testosterone, and zinc supplementation raises testosterone in zinc-deficient men. Evidence for D-aspartic acid is mixed — some short studies show a transient rise, others show no effect, especially in trained men. Overall, expect modest, deficiency-dependent support rather than a clinically meaningful T increase.

Most users tolerate Vitality well at the recommended dose. Common, usually mild effects can include digestive upset, drowsiness or sedation from ashwagandha, headache, and occasional GI discomfort from zinc or DIM (DIM can also harmlessly tint urine). More serious but rare concerns center on ashwagandha and tongkat ali: the NIH LiverTox database rates ashwagandha a probable cause of clinically apparent liver injury, with documented case reports of jaundice and cholestatic hepatitis (rare cases have required hospitalization or transplant), and ashwagandha may alter thyroid hormone levels (Denmark banned it in food supplements in 2020 over thyroid, sex-hormone, and reproductive concerns, though industry groups dispute that assessment). Tongkat ali has been associated with raised liver enzymes in some reports. Stop use and see a doctor if you develop jaundice, dark urine, abdominal pain, unusual fatigue, or a rapid heartbeat. As a dietary supplement, Vitality is not reviewed by the FDA for safety and efficacy the way prescription drugs are.

Generally well tolerated. Occasional mild GI upset, a fishy aftertaste from oyster extract, or headache are possible. Shellfish-allergic individuals should avoid it due to oyster-derived ingredients. This is educational information, not medical advice; supplements are not FDA-evaluated to treat any condition.

As of 2026, a 60-capsule bottle (30 servings, roughly a one-month supply) runs about $46-$55 depending on retailer (about $46-$47 direct from Transparent Labs, around $54.99 at Amazon and Vitamin Shoppe), or roughly $1.55-$1.85 per serving. Subscribe and save typically takes about $6 off plus free shipping, dropping the direct price to around $41. As a dietary supplement it is not covered by insurance; FSA/HSA cards may apply at some retailers. Buying the generic single ingredients separately is cheaper but sacrifices the matched dosing and third-party testing. Prices vary by retailer and promotion, so confirm the current price at checkout.

As of 2026, a single box (120 capsules, about one month at 4 capsules/day) runs roughly $65 from the official site, the only authorized seller. Multi-box bundles such as buy-three-get-two-free cut the effective per-box price and include free shipping but require more upfront. Not insurance-eligible.

Best suited for healthy adult men (often 30+) noticing fatigue, low drive, high stress, or sluggish recovery who want natural hormone support alongside diet, sleep, and resistance training. It is NOT for women, anyone under 18, or men seeking treatment for diagnosed hypogonadism (that requires a physician). Avoid or consult a doctor first if you have liver disease, thyroid disorders, are on thyroid, blood-pressure, sedative, or blood-sugar medication, have a hormone-sensitive condition, or are pregnant or breastfeeding. Ashwagandha has documented case reports of liver injury and may affect thyroid hormone levels, and tongkat ali has been linked to raised liver enzymes in some reports. As with any supplement, discuss it with your clinician before starting, especially if you take prescription drugs.

Healthy adult men who want OTC support for natural testosterone, particularly those who may be low in vitamin D, zinc, or magnesium. Not a treatment for diagnosed hypogonadism. Men with medical conditions or on medication should check with a clinician, and those with shellfish allergies should note the oyster extract.