Why are most consumers of nootropics male?

We have a ton of female customers. They just do not comment here. They are more likely to take something to help themselves, but less likely to want to get into discussions about it online. So you are dealing with selection bias. Also, you sell Modafinil. Men are more likely to take legal risks. Since Modafinil is schedule 4, your view into the amount of women taking Nootropics is most likely even more skewed. Women are more likely to take more natural compounds, with a longer history of anecdotal use. There are certainly more men using Nootropics than women. It's just not as big of a difference as some think it is.