Medical-grade oxygen is classified as a drug by the FDA and requires a prescription for purchase. It is typically 99.2% to 99.5% pure.
You can obtain tanks or concentrators from licensed durable medical equipment (DME) providers. Local Options (Chicago Area):
Sites like Medical Department Store sell cylinders, but they still require a doctor's order for filling or purchase. 🏃 Supplemental & Recreational Oxygen (Over-the-Counter)
