Tribulus Terrestris: What The Trials Show
Tribulus has not raised testosterone in controlled trials in men, despite appearing on nearly every vitality list.
2 September 2026Read →
Maca, ginseng, tribulus, epimedium, zinc, ashwagandha, beetroot, B12 and why a gummy cannot hold a gram.
Tribulus has not raised testosterone in controlled trials in men, despite appearing on nearly every vitality list.
Panax ginseng shows moderate effects on fatigue at 200–400 mg of standardised extract, with warfarin and diabetes-drug interactions.
Maca is studied for libido and energy at 1.5–3 g a day in small trials, with modest results — amounts no gummy can hold.
Most supplement trials are small, short, industry-funded and use specific extracts at specific doses — all of which matter when a produ
A gummy weighs about a gram, mostly sugar, pectin and water, so any ingredient studied at grams — arginine, maca, nitrate — cannot be p
B12 and vitamin D correct fatigue only in deficiency — common in older men, vegans and the housebound — and do nothing extra otherwise.
Beetroot improves stamina through dietary nitrate at 300–500 mg per dose — roughly 500 mL of juice — an amount no gummy can contain.
Ashwagandha at 300–600 mg of standardised extract has fair evidence for stress and some for strength and testosterone in men, with thyr
Zinc contributes to normal testosterone in men who are deficient and does nothing extra for men who are not; the RDA is 11 mg and the u
Icariin, the active in horny goat weed, weakly inhibits the same enzyme as prescription ED drugs in laboratory studies; human evidence