Aizen Power review: ingredients, price, side effects and our verdict

What is Aizen Power?

Aizen Power is a capsule supplement marketed to men for erection quality, stamina and sexual performance. It is sold through the BuyGoods affiliate network from a sales page at aizenpower101.com, which is where affiliate links for this product, including the getaizenpower24.com domain that was not resolving when we checked, ultimately point. The bottle is labeled as containing 60 capsules, and the brand’s FAQ instructs taking one capsule twice daily, so each bottle is a 30-day supply.

The sales page names nine ingredients: milk thistle, cayenne, Korean ginseng, banaba, corosolic acid, zinc, resveratrol, alpha-lipoic acid and green tea. The official page does not display a Supplement Facts panel. A panel reproduced on a third-party promotional site lists, per two-capsule serving: zinc 11 mg (as gluconate), chromium 100 mcg (as picolinate), alpha-lipoic acid 150 mg, green tea leaf extract 150 mg, berberine HCl 100 mg, resveratrol 40 mg, and a 112 mg proprietary blend of milk thistle seed extract, cayenne fruit, Korean ginseng and banaba leaf extract. Interestingly, that panel includes chromium and berberine, which the official page does not mention. Because we could not confirm the label on the vendor’s own site, treat these amounts as provisional and check the bottle you receive.

We analyzed the sales page, the brand’s FAQ and published research on each ingredient. We did not test the product ourselves.

How Aizen Power claims to work

The sales page is written as a first-person story from a man introduced as a 47-year-old medical researcher at a Cleveland clinic, who says he “perfected” the formula. The page describes the product as 100% effective, 100% safe and not habit forming, and says it is made in an “FDA approved” facility. The FDA does not approve dietary supplements or the facilities that make them; facilities can register with the FDA, and the page’s own disclaimer states that its statements have not been evaluated by the FDA.

The brand’s FAQ makes much stronger claims. It says the herbs were used to “alter their genetics” and describes the product as working by activating a “penis growth gene” to send tissue-building cells to the penis, calling it a “penis enlargement tool.” The site’s reference list includes mouse studies on the Sry sex-determining gene, which governs male development in embryos and has nothing to do with adult penis size. We found no evidence that any supplement ingredient, or any combination of them, increases penis size in adults. These claims are not supported by science and are a significant red flag about the seller’s credibility.

Stripped of the marketing, the actual formula reads more like a blood-sugar and antioxidant blend than a dedicated male performance product. Several ingredients (berberine, chromium, banaba, alpha-lipoic acid) are best known for glucose metabolism. That is not irrelevant, since blood vessel and nerve health affect erections and diabetes is a common contributor to erection problems, but it is a long way from the promises on the page.

What the ingredients actually do

Korean ginseng

Ginseng is the only ingredient with direct clinical research on erectile function. A 2021 Cochrane review of nine placebo-controlled trials in 587 men with mild to moderate erectile dysfunction concluded that ginseng appears to have only a trivial effect on erectile function scores over up to 12 weeks. A 2018 meta-analysis of herbal supplements for ED was somewhat more positive about ginseng. Those trials typically used around 1,000 to 3,000 mg of Korean red ginseng daily. In Aizen Power, ginseng shares a 112 mg blend with three other botanicals, so its dose is necessarily a small fraction of that.

Zinc

Zinc is essential for testosterone production. A small 1996 study found that restricting zinc lowered testosterone in healthy young men and that supplementing marginally deficient older men raised it. That supports correcting a deficiency, not boosting testosterone in men who already get enough zinc. The listed 11 mg is a standard daily amount and a reasonable inclusion.

Alpha-lipoic acid

Alpha-lipoic acid is an antioxidant studied mainly for diabetic nerve pain, usually at 600 mg a day. Small studies have looked at it for erectile problems in men with diabetes, but the evidence is limited. A 2020 safety meta-analysis of 71 placebo-controlled studies found no increase in adverse events with supplementation. The 150 mg listed is a quarter of the typical studied dose.

Berberine, chromium and banaba

These three are blood sugar ingredients. Berberine has the most evidence, summarized in a 2023 umbrella review, but at 900 to 1,500 mg a day; the 100 mg listed is far lower. Chromium supplementation improved glucose control in people with diabetes in a 2014 meta-analysis, mostly at doses above 200 mcg. Banaba and its compound corosolic acid have early human data on blood sugar, reviewed here. None of the three has meaningful evidence for erectile function or libido on its own.

Green tea, resveratrol, milk thistle and cayenne

Green tea extract supplies catechins and some caffeine; the NCCIH notes that research on most uses is inconclusive and that rare liver injury has been linked to concentrated extracts. Resveratrol is a popular antioxidant, but a 2021 umbrella review found mostly trivial effects on cardiometabolic markers. Milk thistle is mainly studied for liver health with inconclusive results, per the NCCIH. Cayenne’s capsaicin may slightly raise energy expenditure, according to a meta-analysis, an effect the authors describe as small. None of these has good evidence for sexual performance.

Who it may suit, and who should skip it

Aizen Power might interest a man who wants a general antioxidant and blood-sugar-support blend and likes the idea of including a little ginseng. Even then, most of the doses are below what research has used, and the proprietary blend hides the ginseng amount.

It is not a good choice for anyone hoping to fix erection problems or increase size. Erectile difficulties can be an early sign of heart disease, diabetes or hormone problems, as MedlinePlus notes, and they deserve a proper medical evaluation. Proven treatments exist, and addressing weight, exercise, smoking and alcohol helps many men.

Talk to a doctor before using it, or skip it, if you take diabetes medication (berberine, chromium, banaba, alpha-lipoic acid and ginseng can all lower blood sugar), blood thinners such as warfarin (ginseng has reported interactions), the beta-blocker nadolol (green tea can reduce its levels), or any drug processed by the CYP3A4 or CYP2D6 enzymes, which berberine can inhibit. People with liver disease, a ragweed allergy (milk thistle is in the same plant family), insomnia or a sensitivity to caffeine or spicy foods should also be cautious.

Price, guarantee and where to buy

On the official BuyGoods sales page, Aizen Power is offered in three packages: two bottles at $79 per bottle, three bottles (“2 + 1”) at $69 per bottle, and six bottles (“3 + 3”) at $49 per bottle, with free US shipping on the larger packages. The page text also says a “180-day supply” costs $49 per bottle, which matches the six-bottle deal. Prices were displayed as images, so confirm the total at checkout. Orders are described as one-time payments with no subscription.

The brand offers a 60-day money-back guarantee. Its FAQ says you must return all purchased bottles to the warehouse to receive a refund. If you decide to buy, use only the official page so the order is processed by BuyGoods and covered by the guarantee. The brand states it is not sold anywhere else, and third-party listings may not be genuine.

Our verdict

Aizen Power’s formula is not dangerous on paper, and several of its ingredients are reasonable for general metabolic health. But the only ingredient with direct erectile research, ginseng, has weak evidence and is buried in a small proprietary blend, while the rest are mostly underdosed blood sugar and antioxidant compounds. The ingredient list on the official page does not match the label panel circulating elsewhere, and the official page does not show a label at all.

We give Aizen Power 2.5 out of 5, lower than most products we review. The score reflects thin evidence for its main promise, partial dose transparency, and, above all, marketing that claims the product activates a “penis growth gene” and calls the manufacturing facility “FDA approved.” Those claims make it hard to trust anything else on the page. The 60-day guarantee and one-time billing are its strongest points. Men concerned about erections or stamina will be better served by a check-up with their doctor.