Ray Peat MacGuyvers a CO2 Bag

+++DO NOT PUT YOUR HEAD IN A BAG/BATH OF CO2+++ "Breathing in a paper bag is the quick and easy way to do it. To retain more carbon dioxide. You re-breathe until it feels like you're suffocating and then breathe normally for a while and then repeat the bag breathing. Takes a minute or two of bag breathing to reach that state, but I've seen people just bag breathing three or four times a day lower their blood pressure by 10 or 20 points. And you can absorb carbon dioxide through the skin. So if you fill a tub or a big plastic bag with carbon dioxide and get into it, if you're measuring it with a closed bag, for example, the bag deflates after about half an hour, showing that you've absorbed lots and lots of CO2 through your skin. [Oh, so you can actually... They have contraptions. You get a big plastic bag filled up with carbon dioxide and put yourself in it?] Yeah. I've been doing that occasionally for years. [Really? How do you get the carbon dioxide in there?] I get a tank from a welding supply shop. For 10 kilograms, I think, costs about $20. The tank costs $60 or $80. And you can fill a bag dozens of times with 10 kilograms. [So you're actually getting in the bag and then they have a way that you just... Like around your neck? Or you put your whole head in there, too?] If you have a big enough bag, yeah. You empty the bag as completely as you can, pressing the oxygen out of it, and then blow it up with your tank. And you can see the deflation gradually happening. Or if you're in a tub, carbon dioxide is heavier than air. So with a candle or a lighter, you can check the level. The candle goes out when it's at the level of carbon dioxide. And you can see the level constantly dropping over a period of 30 or 40 minutes. [So you could get a tank, fill up your bathtub with carbon dioxide, but you wouldn't see it. You seal the drains. You wouldn't see it, but it gradually... It just stays in there because it's heavier than air.] Yeah, yeah. And you can check the level by a lighter or a candle. [So you're in this bathtub, you don't see anything, but your body's absorbing the carbon dioxide.] Yeah, you can see after 15 or 20 minutes, usually your skin gets pinker when it gets saturated with CO2. And that pinkness usually lasts for several hours after the episode. Once I was bringing a tank home and I tripped, and I knew if I broke the valve off the top, it would turn it into a rocket. So I clutched it to my body and fell on top of it and sort of squashed and scraped my wrist, falling on the concrete with a tank in my hand. And I immediately, like two or three minutes after it happened, I got a plastic bag, blew it up with CO2, and the purple semi-bloody spot where I'd squashed my wrist, after 15 minutes, the inflamed appearance disappeared. And all that left was a few bits of torn up skin, no bloody or purple sign of an injury left."

When I put together my setup ~10 years ago, the Airgas location I went to only had Nitrogen purging regulators. They had CGA 320 to CGA 580 adapter. I later put together a similar setup for a friend with a CO2 regulator, but it’s not as smooth as my nitrogen regulator.

Whoa! That is so awesome!