Are you concerned with the effect of soy products on testosterone production? Research has shown the consumption of fifty-six grams of soy over a short period of time can reduce testosterone production by nineteen percent (Goodin, et al, 2007). As a healthy male it does give me pause of ingesting more soy than I would need to. Goodin, S., Shen, F., Shih, W. J., Dave, N., Kane, M. P., Medina, P., . . . DiPaola, R. S. (2007, April 01). Clinical and Biological Activity of Soy Protein Powder Supplementation in Healthy Male Volunteers. Retrieved from Clinical and Biological Activity of Soy Protein Powder Supplementation in Healthy Male Volunteers | Cancer Epidemiology, Biomarkers & Prevention ijkey=ce3aac138eabcbe6127d26172fb6d774b7761fd0&keytype2=tf_ipsecsha
I'd hesitate to draw wider conclusions based on that study alone, as it used a single brand of protein supplement, excluded vegetarians and vegans, and used the soy protein as a supplement to normal diet, while collecting data over a relatively short period, all of which I assume to be different to Monkey's use case. Another study did take a slightly more standard use case, although again sampled over a small period. I couldn't find anything using a more substantial time period from a cursory search.
Vegetarians and vegans most likely eat soy very often anyway, possibly causing less of a difference due to the change being smaller.
Last time I checked cookies required some form of dairy products, whether it is butter, eggs or maybe milk, so they are everything else than vegan.
