One idea I’ve been musing about is the connections between IQ, Conscientiousness, and testosterone. IQ and Conscientiousness do not correlate to a remarkable degree - even though one would expect IQ to at least somewhat enable a long-term perspective, self-discipline, metacognition, etc! There are indications in studies of gifted youth that they have lower testosterone levels. The studies I’ve read on testosterone indicate no improvements to raw ability. So, could there be a self-sabotaging aspect to human intelligence whereby greater intelligence depends on lack of testosterone, but this same lack also holds back Conscientiousness (despite one’s expectation that intelligence would produce greater self-discipline and planning), undermining the utility of greater intelligence? Could cases of high IQ types who suddenly stop slacking and accomplish great things sometimes be due to changes in testosterone? Studies on the correlations between IQ, testosterone, Conscientiousness, and various measures of accomplishment are confusing and don’t always support this theory, but it’s an idea to keep in mind.
Such competitive anxieties are already being felt in the workplace. Recently an advice column in Wired featured a question from a reader worried about "a rising star at the firm" who was "using unprescribed modafinil to work crazy hours. Our boss has started getting on my case for not being as productive." And on internet forums such as ImmInst (Immortality Institute), whose members share a nerdy passion for tweaking their cognitive function through drugs and supplements, people trade advice about dosages and "stacks" - improvised combinations - of neuroenhancers ("Cut a tablet into fourths and took 25mg every four hours, four times today, and had a great and productive day - with no side-effects"). In one recent post a 52-year-old - who was working full time, studying for an advanced degree at night and "married, etc" - wrote that after experimenting with modafinil he had settled on two daily doses of 100mg each. He believed that he was "performing a little better", adding: "I also feel slightly more animated when in discussion."
The evidence? Although everyone can benefit from dietary sources of essential fatty acids, supplementation is especially recommended for people with heart disease. A small study published in 2013 found that DHA may enhance memory and reaction time in healthy young adults. However, a more recent review suggested that there is not enough evidence of any effect from omega 3 supplementation in the general population.

We did note a significant warning with this product, namely that the caffeine it contains may cause a negative impact, mainly that some users may experience the jitters. Their dosage suggests that one can take up to 6 pills a day, which we felt was too many. These issues made us a little wary of the product, even though they seem to know the right ingredients to include.
But according to Professor David Weinshenker of Emory University, most people who take Provigil do not report euphoria or even a level of stimulation close to the effects of caffeine. For Weinshenker, the addiction potential of Provigil is limited, and it’s used in various treatment contexts. Provigil may be an effective medication therapy for depression, ADHD, autism and other disorders.
Blueberries and blackberries are at the top of the list of brain-boosting foods because they are exceptionally rich in chemicals called anthocyanins, which are among the most potent antioxidants. "But the real message here is that a diet rich in fruits and vegetables of all kinds does more than keep your heart healthy," says Tufts University neurobiologist James Joseph. It's healthy food for thought.
“By drawing on more than fifteen years of scientific research and experience, Dr. Mosconi provides expert advice to prevent medical decline and sharpen memory. Her brain healthy recipes will help you maintain peak cognitive performance well into old age and therefore delay and may even prevent the appearance of debilitating diseases like Alzheimer’s.”
Kratom (Erowid, Reddit) is a tree leaf from Southeast Asia; it’s addictive to some degree (like caffeine and nicotine), and so it is regulated/banned in Thailand, Malaysia, Myanmar, and Bhutan among others - but not the USA. (One might think that kratom’s common use there indicates how very addictive it must be, except it literally grows on trees so it can’t be too hard to get.) Kratom is not particularly well-studied (and what has been studied is not necessarily relevant - I’m not addicted to any opiates!), and it suffers the usual herbal problem of being an endlessly variable food product and not a specific chemical with the fun risks of perhaps being poisonous, but in my reading it doesn’t seem to be particularly dangerous or have serious side-effects.
The difference in standard deviations is not, from a theoretical perspective, all that strange a phenomenon: at the very beginning of this page, I covered some basic principles of nootropics and mentioned how many stimulants or supplements follow a inverted U-curve where too much or too little lead to poorer performance (ironically, one of the examples in Kruschke 2012 was a smart drug which did not affect means but increased standard deviations).

Dr. Mosconi’s book is keystone book for advancing the dialogue and practice of integrative brain health. This is the book I’ve been waiting for. As someone who is obsessed with nutrition, it’s very hard to find REAL research and sound logic. There’s a lot of people who proclaim to be health experts, but few people who can say they are trained in both scientific and holistic approaches. Dr. Mosconi’s book FINALLY gets to the bottom of what we all need to know to take care of our brains.
We felt that True Focus offered a good product but the price was slightly high compared to others. Their website doesn’t show a clear money-back guarantee though, which definitely reduced their rating. We found that their customer reviews were mixed and saw that some consumers did not mind paying a little more for a product that is more consumer friendly.

Burke says he definitely got the glow. “The first time I took it, I was working on a business plan. I had to juggle multiple contingencies in my head, and for some reason a tree with branches jumped into my head. I was able to place each contingency on a branch, retract and go back to the trunk, and in this visual way I was able to juggle more information.”
I am sort of a health nut. I only use natural medicines- never prescriptions. Lately I have been experiencing some brain fog in spite of my detoxing, so I tried this product. I LOVE IT! I really can tell a difference. I have tried many memory and brain support supplements before, but this one seems quite different. I love the daytime and separate night time formulas. I have never slept so soundly in my life. In fact, I've always had a lot of trouble sleeping, but I sleep like a baby and wake feeling refreshed and full of energy.

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.[42][43] Two other systematic reviews noted no cognition-enhancing effects in the general population or middle-aged and older adults.[44][45]