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NoSuchPlace comments on Testing my cognition - Less Wrong
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It may be worth looking at gwern's essays on nootropics first, since they has done similar self experiments.
One thing in particular you could consider is looking if you can find something which looks/tastes similar enough to creatine that you can use it as a placebo to blind your self. For example you could get a friend to put the creatine and placebo in different containers, but not tell you which. Then take substance 1 for 2 weeks, then take substance 2 for 2 weeks. Then get your friend to tell you which box contained the creatin (or better yet have them write it down somewhere and then don't look at it.)
This would probably be easier for substances other than creatine; it needs to be taken in pretty large doses (5-10 grams, although some sources recommend an initial phase of up to 25 grams) to be effective, and it has a distinctive taste and odor. Unless you want to be swallowing ten or so 00 gel capsules a day...
I've never noticed a smell or taste to my micronized creatine monohydrate. Maybe because I take it in fruit juice?
Taking it in fruit juice also solves the "how to make a placebo" problem.
Creatine doesn't dissolve in water at all, so the placebo would have to be something else that has that property.
It really doesn't have a taste or smell at all. I take it in a small amount of water and it's basically just completely tasteless particles suspended in solution but not fully dissolved. You can get creatine caps, but its a pain to swallow enough of them.
I take it IV isn't practical?
Although, if Ryan hasn't tasted it before, finding something that also has a distinctive taste is better than nothing. That would be an interesting study to have (maybe someone has already done it): is there a bigger placebo effect if the taste is more distinctive?
Creatine is sufficiently bulky that blinding would be a pain in the ass (you'd need something like 10 OO gel caps a day, although at least creatine is tasteless in my experience), and it's also very cheap; so I'm not sure blinding is entirely justified on a cost-benefit basis. It may be better to just randomize blocks of 2/3 weeks: it won't eliminate the expectancy or other placebo effects, but it does eliminate most of the potential problems. And just randomizing is a heck of a lot easier.
Creatine's beneficial effects seem to come from having higher systemic levels of creatine which takes a while to build. I have used it as a supplement many times for weight lifting and the effects (water retention, extra "pump" after a lift, ability to squeak out one more rep, etc.) are not noticeable until you've been taking it for about a week.
Blinding would not work here unless you made a ton of real caps and a ton of placebo caps and separated them. Then, pick one whole batch and take it for 2-3 weeks. This increases the length of time of the experiment dramatically to get any useful data.
Out of curiosity, does creatine change the way the muscles you build look? E.g. my impression is that people who use steroids will develop very vascular/veinous muscles.
No, not long-term. The vascular/veiny musculature that you see on fitness-mag body builders come from a few things: Taking vasodilators (short acting supplements and drugs that cause dilation of blood vessels) is one. The amino acid Arginine causes an increase in Nitirc Oxide in the blood which is a vasodilator. There are other supplements and drugs that do this as well. Also, having low body fat causes this naturally, as well as just having worked out. The vein-bulging look is not something that these people have all day every day.
Steroids DO actually change the shape of your muscles a bit.
Creatine is believed to work through 2 pathways:
Increasing the rate at which ADP is recycled back to ATP, allowing you to "squeak out one more rep" and hopefully stimulate a better training adaptation when your body recovers.
Increasing water retention in your muscles. Some people believe that the presence of additional water is what helps you perform better and recover more quickly.
While you're supplementing with creatine, it may make your muscles look a little bit bigger because of the additional water retention, but if you let it "wash out" by stopping for a week or two, you will notice no difference in the appearance of your muscles. Creatine is not believed to have an anabolic effect on its own. It's just an aid to training and considered extremely safe.
Cool, thanks for the info!
Creatine will make you retain water in the muscles, which will make them look bulkier than they otherwise would.
Yes, gwern's essays are what has motivated me to test these particular agents.
I'm not clear on optimal management of placebo effects. The thing is that placebo effects are still effects. And if knowing that creatine's effect is a placebo will stop me from taking creatine and thereby rob me of its benefits then I would rather be ignorant. So I kind of don't want to test it against a placebo, although I recognise that this feels suspicious. Happy to be clarified on this one.
Of course, the creatine could boos my score by making me redistribute my exertion of mental energy toward testing times, which is useless...