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: Must be 87% to 95% pure and requires a prescription defining the flow rate (LPM) and duration of use.
: Oxygen concentrators are "Class II Medical Devices". Sellers who do not require a prescription for these devices are likely operating illegally or selling non-medical equipment. 2. Major Risks of Online Purchases RISKS OF BUYING HOME OXYGEN ONLINE buy oxygen online
: Sold for "wellness" or "recreational" use (e.g., athletics or altitude), these products are not FDA-regulated and are not appropriate for medical therapy. : Must be 87% to 95% pure and