Boostaro: Daily Nitric Oxide & Circulation Support for Men

Boostaro is a daily two-capsule supplement for men built around the nitric oxide and blood flow pathway rather than hormones. The label shows vitamin C (500 mg), vitamin K2 (100 mcg) and a 725 mg proprietary blend of L-citrulline, L-lysine, French maritime pine bark extract (95% proanthocyanidins), magnesium citrate and nattokinase. Each bottle is 60 capsules — a one-month supply — and orders from the official website carry a 180-day money-back guarantee.

No, and it is important to be clear about this. Viagra and Cialis are prescription PDE5-inhibitor medications that act within an hour, used under medical supervision. Boostaro is a dietary supplement that supports the body's own nitric oxide production gradually over weeks. It is not a treatment for erectile dysfunction, and persistent ED deserves a doctor's visit — it is often an early signal of cardiovascular issues worth catching.

Through the L-arginine–nitric oxide pathway that controls how blood vessels relax. L-citrulline converts to L-arginine in the body — more reliably than swallowing L-arginine itself, which is largely broken down before it reaches circulation. Pine bark proanthocyanidins support the enzyme that turns that arginine into nitric oxide, and vitamin C helps protect nitric oxide once it is made. The result the research points to is better vascular responsiveness, not an on-demand effect.

The finished product has not been clinically studied — standard in this category — but the two lead ingredients have genuine human trials. Oral L-citrulline at 1.5 g/day improved erection hardness scores in half of men with mild ED versus 8% on placebo in a 2011 single-blind study, and pine bark extract with an arginine source improved erectile function in a randomised double-blind crossover trial. The honest caveat: the label's entire proprietary blend is 725 mg, which is half the citrulline dose used in that 2011 study before counting the other four ingredients. Expect gradual, modest support at best.

From the current Supplement Facts label: vitamin C 500 mg, vitamin K2 (menaquinone) 100 mcg, and a 725 mg proprietary blend of L-citrulline, L-lysine HCl, pine (Pinus pinaster) bark extract standardised to 95% proanthocyanidins, magnesium citrate and nattokinase, in a vegetable cellulose capsule. Worth knowing: some marketing pages list CoQ10 and L-proline, which do not appear on this label — formulas change, so read the label on the bottle you receive.

Because 725 mg has to cover five ingredients, and you cannot see how it is split. For comparison, the human research used 1,500 mg/day of L-citrulline alone, 80–120 mg of pine bark extract, and around 100 mg of nattokinase. Even if citrulline takes most of the blend, it sits well below the studied dose. The vitamin C and K2 amounts are disclosed and meaningful; the blend is where transparency stops. That is the main reason our rating is not higher.

From the official order page: one bottle is $69 plus $9.99 shipping. Three bottles are $177 ($59 per bottle, 90-day supply) with a free bonus e-book. Six bottles are $294 ($49 per bottle, 180-day supply) with a free bonus bottle, two bonus e-books and free shipping — about $1.63 a day. All are one-time payments. Prices change, so confirm the package and total on the final order screen.

Vascular-support ingredients build effects gradually. Most reporting describes early changes in daily energy over the first few weeks, with the 30-to-60-day window being where users say differences become noticeable. The 90 and 180-day packages exist because the manufacturer recommends sustained use. If you will not take two capsules daily for at least two months, the format is unlikely to show you anything.

The label ingredients are generally well tolerated at typical doses — mild digestive upset is the most commonly reported effect. Two ingredients need real attention. Nattokinase has fibrinolytic (clot-dissolving) activity, so anyone on blood thinners or antiplatelet drugs, with a bleeding disorder, or ahead of surgery should not take this without medical advice. And vitamin K2 directly opposes warfarin — the combination of K2 plus nattokinase makes this formula genuinely unsuitable for anyone on anticoagulation. Nitric oxide support can also add to blood-pressure medication effects.

Ask your doctor first if you take any of these: warfarin or other anticoagulants and antiplatelets (the K2–nattokinase issue above), nitrate medications such as nitroglycerin, blood-pressure medication, or prescription ED medication — stacking nitric oxide pathways can drop blood pressure. This is a men's adult formula: not for anyone under 18, and stop it at least two weeks before scheduled surgery because of the nattokinase.

No — no dietary supplement is FDA approved. The FDA does not evaluate or approve supplements before sale. Boostaro states it is made in an FDA-registered, GMP-certified US facility, which is a manufacturing standard rather than an endorsement, and the correctly-worded pages around this product say exactly that. Pages claiming “FDA approved” are overstating what registration means.

Through the official website only. The maker states it is not sold on Amazon, Walmart, eBay or GNC, and that marketplace listings under the name are not covered by the guarantee. The official checkout is where the 180-day money-back window, current bundle pricing and the bonus materials apply. Save your order confirmation — it is what the refund process runs on.