Power-wise, the effects of testosterone are generally reported to be strong and unmistakable. Even a short experiment should work. I would want to measure DNB scores & Mnemosyne review averages as usual, to verify no gross mental deficits; the important measures would be physical activity, so either pedometer or miles on treadmill, and general productivity/mood. The former 2 variables should remain the same or increase, and the latter 2 should increase.
One should note the serious caveats here: it is a small in vitro study of a single category of human cells with an effect size that is not clear on a protein which feeds into who-knows-what pathways. It is not a result in a whole organism on any clinically meaningful endpoint, even if we take it at face-value (many results never replicate). A look at followup work citing Rapuri et al 2007 is not encouraging: Google Scholar lists no human studies of any kind, much less high-quality studies like RCTs; just some rat followups on the calcium effect. This is not to say Rapuri et al 2007 is a bad study, just that it doesn’t bear the weight people are putting on it: if you enjoy caffeine, this is close to zero evidence that you should reduce or drop caffeine consumption; if you’re taking too much caffeine, you already have plenty of reasons to reduce; if you’re drinking lots of coffee, you already have plenty of reasons to switch to tea; etc.
For obvious reasons, it’s difficult for researchers to know just how common the “smart drug” or “neuro-enhancing” lifestyle is. However, a few recent studies suggest cognition hacking is appealing to a growing number of people. A survey conducted in 2016 found that 15% of University of Oxford students were popping pills to stay competitive, a rate that mirrored findings from other national surveys of UK university students. In the US, a 2014 study found that 18% of sophomores, juniors, and seniors at Ivy League colleges had knowingly used a stimulant at least once during their academic career, and among those who had ever used uppers, 24% said they had popped a little helper on eight or more occasions. Anecdotal evidence suggests that pharmacological enhancement is also on the rise within the workplace, where modafinil, which treats sleep disorders, has become particularly popular.
But what does this all have to do with food? Our gut helps keep our body’s immune responses and inflammation under control. Additionally, gut hormones that enter the brain or are produced in the brain influence cognitive ability, like understanding and processing new information, staying focused on the task at hand and recognizing when we’re full. (3)
Modafinil is not addictive but there may be chances of drug abuse and memory impairment. This can manifest in people who consume it to stay up for way too long, as a result, this would probably make them sick. Long-term use of Modafinil may reduce plasticity and can have an adverse effect on the memory of some individuals. Hence it is sold only on prescription by a qualified physician.
I decided to try out day-time usage on 2 consecutive days, taking the 100mg at noon or 1 PM. On both days, I thought I did feel more energetic but nothing extraordinary (maybe not even as strong as the nicotine), and I had trouble falling asleep on Halloween, thinking about the meta-ethics essay I had been writing diligently on both days. Not a good use compared to staying up a night.
According to Dr. Cohen, there’s no incentive for these companies to conduct trials to determine if their products actually do anything, so few of them do. In fact, he says he isn’t aware of any studies on nootropics that meet the research gold standard: double-blind, placebo-controlled, comparing meaningful numbers of healthy adults (not laboratory mice or rats) in terms of relevant measures of cognitive enhancement.
Omega-3 fatty acids: DHA and EPA – two Cochrane Collaboration reviews on the use of supplemental omega-3 fatty acids for ADHD and learning disorders conclude that there is limited evidence of treatment benefits for either disorder. Two other systematic reviews noted no cognition-enhancing effects in the general population or middle-aged and older adults.
Last summer, I visited Phillips in the high desert resort town of Bend, Oregon, where he lives with his wife, Kathleen, and their two daughters, Ivy and Ruby. Phillips, who is now 36, took me for coffee at a cheery café called Thump. Wearing shorts, flip-flops and a black T-shirt, he said: "Poker is about sitting in one place, watching your opponents for a long time, and making better observations about them than they make about you." With Provigil, he "could process all the information about what was going on at the table and do something about it". Though there is no question that Phillips became much more successful at poker after taking neuroenhancers, I asked him if his improvement could be explained by a placebo effect, or by coincidence. He doubted it, but allowed that it could. Still, he said, "there's a sort of clarity I get with Provigil. With Adderall, I'd characterise the effect as correction - correction of an underlying condition. Provigil feels like enhancement." And, whereas Adderall made him "jittery", Provigil's effects were "completely limited to my brain". He had "zero difficulty sleeping".
On the plus side: - I noticed the less-fatigue thing to a greater extent, getting out of my classes much less tired than usual. (Caveat: my sleep schedule recently changed for the saner, so it’s possible that’s responsible. I think it’s more the piracetam+choline, though.) - One thing I wasn’t expecting was a decrease in my appetite - nobody had mentioned that in their reports.I don’t like being bothered by my appetite (I know how to eat fine without it reminding me), so I count this as a plus. - Fidgeting was reduced further
Take the synthetic nootropic piracetam, for example. Since piracetam has been shown to improve cell membrane function and cause a host of neuroprotective effects, when combined with other cell membrane stabilizing supplements such as choline and DHA, the brain cells on piracetam can better signal and relay messages to each other for a longer period of time, which improves cognition and brain activity and decreases risk of a crash. So one example of an intelligent “stack” is piracetam taken with choline and DHA.
There are a variety of substances to get magnesium from. Considerable enthusiasm for the new compound magnesium l-threonate was stirred by 2 small animal rat studies finding that magnesium l-threonate was able to increase magnesium levels in the brain and improve learning/memory tasks. (There are no published human trials as of October 2015, and evidence of publication bias, which I take as evidence against there being large effects in humans.) Animal studies mean very little, of course (see the appendix), but I thought it’d be interesting to try using l-threonate, so I bought the $30 Life Extension Neuro-Mag Magnesium L-Threonate with Calcium and Vitamin D3 (205g), which according to the LEF product page works out to ~60g of Magtein™ magnesium L-threonate and ~4.31g elemental magnesium inasmuch as LEF claims 2000mg of threonate powder provides 144mg elemental magnesium or a 14:1 ratio. (I don’t need the calcium or vitamin D3, but this was the only magnesium l-threonate on Amazon.) Experiment-wise, I’ll probably look at sleep metrics and Mnemosyne performance; I put off designing a blind self-experiment until after trying some.
Instead of buying expensive supplements, Lebowitz recommends eating heart-healthy foods, like those found in the MIND diet. Created by researchers at Rush University, MIND combines the Mediterranean and DASH eating plans, which have been shown to reduce the risk of heart problems. Fish, nuts, berries, green leafy vegetables and whole grains are MIND diet staples. Lebowitz says these foods likely improve your cognitive health by keeping your heart healthy.
The nootropics I’m taking are called RISE, and they're made by a company called Nootrobox, which was started by Geoffrey Woo, a young Stanford computer science graduate. There's no one common ingredient in nootropics; what unites them is the intent to improve brain performance. The RISE stack, which costs $29 plus shipping for 30 pills, contains 350 mg of bacopa monnieri powder (an herb that is commonly used medicinally in South Asia), 100 mg of L-theanine (an amino acid found in green tea), and 50 mg of caffeine (about the amount in a can of Diet Coke). Like most nootropics, the RISE stack itself isn't FDA-approved for use as a cognitive enhancer, but Nootrobox says that the compounds within it are approved as dietary supplements. "We use the precise ingredients at the right dosages and the right ratios as supported by double-blind, peer-reviewed clinicals," Nootrobox's site claims.
Mercury, as well as other heavy metals such as lead, can accumulate in brain tissue, as well as in the spinal cord, as they are fat-soluble - meaning that they can hide itself in fat tissue, which is abundant in both the brain and the spine. Once there, they can displace important nutrients for brain health such as zinc and iron, which are needed for neurotransmitter production, as well as induce an inflammatory process called oxidative stress among other things.
l-Theanine – A 2014 systematic review and meta-analysis found that concurrent caffeine and l-theanine use had synergistic psychoactive effects that promoted alertness, attention, and task switching; these effects were most pronounced during the first hour post-dose. However, the European Food Safety Authority reported that, when L-theanine is used by itself (i.e. without caffeine), there is insufficient information to determine if these effects exist.