Former presidential candidate Robert F. Kennedy Jr., the 70-year-old posted a video of himself showing off an impressive physique. Elon Musk pushed a step further last week, retweeting a post that said “low T men” can’t think for themselves, and “high T alpha males” are the best decision makers for a democracy.

Motivational speaker Tony Robbins invested in a telehealth testosterone prescriber and promotes the steroid on Instagram. The Vitamin Shoppe, a national retail chain, announced Tuesday that its telehealth service will offer testosterone prescriptions.

Men generally pay anywhere from $1200 to $2600 a year for testosterone treatment, which is touted in online ads as a means to better performance in the gym and the bedroom.

Some men swear by the treatment. Others suffer its side effects. Advertising for testosterone rarely mentions the risk of male breast enlargement, shrunken testicles, blood clots and infertility.