ErecPower Ingredients: The Nine Names on the Label

Essential mineral · Mineral

One of two minerals on the panel and one of the most common shortfalls in the ordinary American diet. Magnesium is a cofactor in hundreds of enzyme reactions, including those governing muscle function, nerve signalling and energy metabolism. Evidence: the mineral itself is thoroughly characterised — the NIH Office of Dietary Supplements maintains the reference intakes and the deficiency picture. What is not established is that adding magnesium does anything for vitality in a man who is already replete, and this website will not claim it does.

Sources: NIH Office of Dietary Supplements

Essential mineral · Mineral

The mineral with the clearest link to male hormonal health — and the clearest caveat. Evidence: a 2023 systematic review of the zinc–testosterone relationship, and older work on dietary zinc restriction (Prasad 1996), both point the same way: zinc deficiency lowers testosterone, and correcting a deficiency raises it. The caveat that matters: men who are already zinc-sufficient see little to no testosterone benefit from extra zinc. So this ingredient helps if you were short of it and does close to nothing if you were not. NIH also sets the tolerable upper intake at 40 mg a day — worth knowing if you take a separate zinc supplement alongside this one.

Sources: 2023 systematic review · Prasad 1996 · NIH Office of Dietary Supplements

Puncture vine · Botanical

A thirty-year fixture of men’s supplements, marketed hard on testosterone since the 1990s. Evidence: this is the weakest item on the panel and we would rather say so than not. A 2025 systematic review in Nutrients of clinical trials found eight of ten studies reported no significant change in androgen profile and concluded there is no robust evidence tribulus raises testosterone. A prospective trial found no significant difference in total or free testosterone, LH or semen parameters after treatment. Some trials do report improvements in self-reported sexual function, which appear to run through a route other than testosterone. Treat any testosterone claim about this herb — here or anywhere — with scepticism.

Sources: 2025 systematic review in Nutrients · prospective trial in men

Flavonoid · Botanical

A flavone found in passionflower, honey and propolis, included in men’s formulas because laboratory work shows it inhibits aromatase, the enzyme that converts testosterone to oestrogen. Evidence: the aromatase activity is real in a test tube. The problem is oral bioavailability — chrysin is very poorly absorbed, and human studies have generally failed to show the hormonal changes the laboratory work suggests. There is no strong public human trial record to link you to, and rather than dress up a weak source, we point at NCCIH on how to read botanical evidence of this kind. Read chrysin as a traditional inclusion, not a proven active.

Sources: NCCIH

Horny goat weed · Botanical

The classical herb of this category, used in Chinese medicine for centuries. Its principal active is icariin, a flavonoid studied on the nitric-oxide signalling pathway that governs blood flow. Evidence: laboratory and animal work (Shindel 2010, J Sex Med) describes icariin as a weak PDE5 inhibitor — orders of magnitude less potent than prescription PDE5 drugs — alongside effects on endothelial nitric oxide synthase. Controlled human data remain limited. MedlinePlus carries the consumer summary and the interaction list. Caution: may interact with blood thinners and blood pressure medication.

Sources: Shindel 2010, J Sex Med · MedlinePlus

Eurycoma longifolia · Botanical

A Southeast Asian root, and after zinc the best-supported item on this panel. Evidence: a 2022 systematic review and meta-analysis of clinical trials pooled five randomised controlled trials and found a significant increase in total testosterone with Eurycoma longifolia supplementation, with the clearest effect in men who were hypogonadal to begin with. Trials typically use standardised root extracts around 200 mg a day over months, not weeks. The same caveat as zinc applies: the effect is strongest in men who were low, and the reviewers themselves call for more research before treating it as settled.

Sources: 2022 systematic review and meta-analysis

Serenoa repens · Botanical

Best known for prostate and urinary support in older men rather than for vitality as such, which is the honest reason it sits on a men’s panel. Evidence: NCCIH summarises a large but genuinely mixed trial literature — several well-conducted studies found saw palmetto no better than placebo for urinary symptoms. Caution: saw palmetto has hormonal activity and can interact with anticoagulants and with hormone-related medicines. If you take either, or you are being treated for a prostate condition, speak to your clinician before starting.

Sources: NCCIH

Crataegus pinnatifida · Botanical

A traditional cardiovascular tonic, included here for circulation rather than for hormones. Evidence: NCCIH covers the hawthorn literature, most of which concerns heart failure symptoms rather than healthy adults, and it flags the interactions clearly. Caution: hawthorn can interact with heart and blood pressure medication. This is one of the reasons the medication warning on this website is not boilerplate.

Sources: NCCIH

Cissus quadrangularis · Botanical

A climbing vine used in Ayurvedic medicine, most often studied for bone and joint support and, more recently, for body composition. Its presence on a men’s vitality panel is traditional rather than evidence-led. Evidence: thin in humans, and we could not point you at a robust public trial record that would justify a vitality claim. NCCIH sets out how to weigh a botanical in that position. Read it as a supporting inclusion.

Sources: NCCIH