Oxygen Plus FDA-Registered Facility-Filled 99.5% Pure Recreational Oxygen Cans - O+ Biggi 9-Pack - Each Portable Oxygen Canister is 50+ Breaths, 11 litres - Restore Oxygen Levels w/Canned Oxygen

I left a 5⭐️ so you’d read this. I was skeptical before buying this. I purchased for workout recovery. I purchased and O2 monitor to test results as well as just based on how I felt. The cans are full of “Air” not O2. Hopefully it’s at least clean. I don’t have a way to test that. After several heavy workouts in the hot humid Virginia summer. I used this product repeatedly and checked my O2 with monitor and noted general recovery times. The results…… 0, nothing. The exact same as if it took some deep breaths. If this works for you it’s just the placebo effect. Like the promise from bottled water doing something special for you.Side note: O2 is highly flammable. If you use this on an open flame, it blows out the flame.I will sell you a ziplock bag of air for half the cost, so save money and Venmo me for a bag of air.

Came empty plus because its potage dangerous, couldn't send it back for refund

I have heart problems, and other issues, and I keep a bottle at my desk, by my treadmill and on my nightstand. I don't think I get the 200 or so inhalations as stated, but it is helpful enough. Maybe I breathe too deeply. Handy to have, though, and cheaper than at the drug store or medical supply house

This product do increase oxygen level very fast . Just pricy. I will give 5 star if not expensive.

These canisters are NOT 99.5% Oxygen. They are COMPRESSED AIR. TOTALLY NORMAL COMPRESSED AIR. Not only do I know this from the complete lack of effect on my blood Oxygen levels, I ALSO tested it on a Propane Torch. There should have been a dramatic difference in the torch's flame. NOTHING. Absolutely ZERO effect. I am assuming that the people you sell these to, are too DRUNK, or high on other drugs, to realize that there is no extra Oxygen at all. Just plain, ordinary air. Nothing more.