The first item on that list should be creatine.
Benton, D., & Donohoe, R. (2011). The Influence of Creatine
Supplementation on the Cognitive Functioning of Vegetarians and
Omnivores. British Journal of Nutrition, 105(07), 1100–1105.
doi:10.1017/S0007114510004733
Ling, J., Kritikos, M., & Tiplady, B. (2009). Cognitive effects
of creatine ethyl ester supplementation. Behavioural Pharmacology,
20(8), 673–679. doi:10.1097/FBP.0b013e3283323c2a
Rae, C., Digney, A. L., McEwan, S. R., & Bates, T. C. (2003).
Oral creatine monohydrate supplementation improves brain
performance: a double–blind, placebo–controlled, cross–over trial.
Proceedings of the Royal Society of London. Series B: Biological
Sciences, 270(1529), 2147 –2150. doi:10.1098/rspb.2003.2492
Rawson, E. S., Lieberman, H. R., Walsh, T. M., Zuber, S. M.,
Harhart, J. M., & Matthews, T. C. (2008). Creatine
supplementation does not improve cognitive function in young adults.
Physiology & Behavior, 95(1–2), 130–134.
doi:10.1016/j.physbeh.2008.05.009
Rawson, E. S., & Venezia, A. C. (2011). Use of creatine in the
elderly and evidence for effects on cognitive function in young and
old. Amino Acids, 40(5), 1349–1362. doi:10.1007/s00726-011-0855-9
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The research on piracetam is quite extensive. Try doing a search on
scholar.google.com for the following terms:
piracetam dyslexic
piracetam verbal
piracetam healthy
piracetam cognitive
piracetam children
piracetam double blind
You can also try combinations of those. You'll see there's a ton of
research out there on the effects of piracetam in children (which
would be a much better indication of how likely it is to help you
than studies on effects in the elderly or demented). I remember
seeing a study at one point that compared the effect of piracetam on
verbal memory in dyslexic children to the effect in healthy
children, and found no difference (both improved equally); if you
dig around you might be able to find it.
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Fish oil (and omega-3 fatty acids in general) have been found to
have a weak effect size in all of the studies I've seen, and you
need to take large doses for that (on the order of a gram or two
each of EPA and DHA). It's probably worth the expense and the time
involved in taking the pills, but don't expect anything dramatic
from them. If you find that you get tired of taking so many
supplements and pills each morning, I would suggest cutting fish oil
out of your routine before creatine, piracetam, or vitamin D.
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Be careful with amphetamine, it's potent stuff. Keep in mind that
one of the effects of amphetamine (and other catecholaminergic
stimulants, like Ritalin/methylphenidate) is that it makes the
goggles through which you view your own performance a bit more
rosily tinted. That is, amphetamine will often make you feel like
you're performing better even when you're not.
Modafinil (aka Provigil) is a much safer stimulant, and for many
people is equally effective vs. amphetamine for concentration-like
stuff. Try it. If it works for you, you should strongly consider
replacing amphetamine with modafinil.
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Vitamin D is very important for health, and most people in
industrialized nations are sorely deficient in it, since we aren't
outside in midday as much, and since we usually wear clothes. In the
USA, about 10x as many people die from vitamin D deficiency (which
increases cancer incidence, especially in the digestive system) as
die from UV-induced skin cancer. Most people would do well to
supplement with around 5000 IU/day. Getting the right dosage is a
bit tricky, though, as it depends on your skin tone, lifestyle,
latitude, the season, and other stuff. Blood tests for vitamin D
levels are around $50; I suggest you supplement with 5,000 IU/day
for 30 days, then get your blood tested, and adjust the dosage from
there.
If your diet is good, most other vitamins are probably unnecessary
and wouldn't help. They're cheap enough that you might as well take
them, though. Magnesium deficiency can result in anxiety and poor
stress management, so supplementing with that may help. If you're
female and/or vegetarian, you may be iron deficient; be careful,
though, since excessive iron intake is toxic. Blood tests for anemia
are in order if you suspect iron deficiency. B vitamins can also
help, especially B12. Vitamin C is worthless unless you (a) like how
it tastes, or (b) are
a college
student living exclusively off of porridge or Ramen, who
hasn't eaten any fruit for a year.
Jonathan