FLOW Nitric Oxide Booster review
A daily watermelon and spinach supplement aimed at circulation, energy and sex drive
By the RJ Editorial Team. Sales page checked 2026-09-23. Last updated 2026-09-23.
Is it worth it?
Maybe you've noticed things aren't what they were. Less energy by mid afternoon, less interest at night, and when you are interested, your body takes longer to catch up. That's the itch this is aimed at, and it's a normal one with age. FLOW is a daily supplement built on watermelon and spinach extracts. The idea isn't invented. Watermelon is a source of citrulline, your body converts that toward nitric oxide, and nitric oxide relaxes blood vessels. Citrulline and beetroot studies do show modest effects on blood flow and blood pressure. The gap is dose. Trials that found something generally use several grams of citrulline daily, and the page never states how much is in a serving. It also promises results for energy, sleep and sex without pointing to any testing of this specific formula. That's the seller's promise, not evidence. The free bottle is really a subscription starter. You pay shipping, then $22.47 monthly until you cancel. Fine if you read it, irritating if you didn't. Worth a go if you're curious, expect something gentle, and can cancel without a fight. If arousal or erections changed noticeably and fairly suddenly, that's worth a GP visit rather than a supplement, since it can be an early circulation or hormone signal. Same if you take nitrates or blood pressure medication, because those genuinely interact with nitric oxide boosters.
Pros
- Cheap way to test whether it does anything for you
- Food based ingredients rather than a drug
- Sold to women as well as men, which is unusual here
- Monthly price is clearly stated at $22.47
Cons
- No dose per serving listed, so you can't tell if it's a meaningful amount of citrulline
- Free bottle enrols you in recurring billing
- No refund terms, shipping cost or delivery time given on the page
What you get
One bottle of FLOW, a nitric oxide supplement built around organic watermelon, spinach and cherry extracts. First bottle is free if you cover shipping and start the subscription, then $22.47 a month with 25% off, cancel anytime. Bottles then arrive monthly. The page doesn't say the serving size, the bottle count, or how much citrulline is in a dose.
Before you buy
- Find the shipping charge and the refund policy before you enter card details
- Check how cancelling works, ideally in your account rather than by email
- Ask your doctor first if you take nitrates, blood pressure medication or erectile dysfunction drugs
Who it suits
Someone in their 40s or older who wants a low cost, food based nudge for circulation and libido and is comfortable managing a subscription
