Perhaps, truth or dare.  Don't know until you try.  Could have
different effects on different individuals.  BS is that we're set to
believe that the taking pills, in general, is a cure for all ailments.
Pill popping society...is that a cult or what?  Okay, too much of the
extreme.  I hope all the best for your brother.

Moodie
oooomoodie@yahoo.com

"My brother has something called OxygenUptake pills that supposedly
increase oxygen uptake into the blood.  I told him they are bulls@!t.
Yes/No?"

Dollars to doughnuts  they are sold under the current supplement laws.  
Your brother can not make an informed purchasing decision because he
bought a pig in a polk as to effectiviness, safety, and what is in it.  
He is lucky because it is probably not harmful but also does nothing
either but make his wallet thinner.  He can not even research the calims
because no scientific research has been done, aside from the marketing
psychology to induce people to buy pigs in a polk.

No such thing. The affinity of oxygen by blood is fixed by physiological
conditions such as pH and type of hemoglobin.
The limiting factor is trouble breathing in which you are given oxygen.
You don't take a pill for that.
The question I have is why would somebody want to increase oxygen in the
blood in the first place unless somebody told him a BS story. You need to
create a perceived need in the first place and then sell something they
don't really need.
Michael Jackson sleeping in a hyperbaric oxygen chamber.
Too much oxygen can be damaging and toxic.