How do you respond to reviewers saying it’s no oxygen with their flame test?

These comments such as useless product etc Do not know what they speak of. This product supplements the human cells with added O2. Such products have been in use....sold for years. Wanna test to see if this product works? Go run until you are exhausted. Your muscles are low on O2. Inhale the canned O2 95%! Inhale this several times. You'll realize said product is beneficial to your body within 2 - 3 minutes! Note.... Ignore the idiots posting negative comments. Maybe they are expecting some sort of sudden high or sudden major effect. Who knows what wrong with their brains....lack of 02? Rising shotguns? I've been using such products since 2009 for several reasons. It works.

Can you carry on a plane

Per FAA, canned oxygen may not be carried on a plane or in checked baggage.

is this good for mild copd

I use boost everyday for COPD and heart problems. It's great when a large tank is too large. I carry it in the market when for a quick trip. The only drawback is it's difficult to figure your use and sometimes run out. There is no meter on the bottle.