[ChuckM]

A known possible side effect of testosterone replacement therapy is gynecomastia (male breast growth); some of the excess testosterone is converted into additional estrogen, which can enhance breast growth.  This is how I first started to develop breasts, when I started TRT following surgery for a pituitary tumor which had knocked out my natural T production.  Lotus would have a solid answer for you if she sees this post, but IMO, OTC T booster would likely not have much of an effect one way of the other.

Best regards,
ChuckM