I'd love to be beautiful as much as the next guy but man, seems risky.
In modern America, with allopathic medicine being the norm, its difficult to obtain some things that are likely safe at a 3 sigma confidence interval. Yet conversely, and reminder we share healthcare costs partially as a society through Medicare and Medicaid, you're free to pour McDonalds into yourself and add $X00k of cost onto the healthcare system, and "infringing on that right" and heaven forbid enacting a tax on sugar products is somehow unacceptable.
I can shorten my life expectancy by 15 years in so many ways. But to buy XYZ drug without a giant multi-day process which on average is positive, and even at ABC confidence level is not negative, nahhhh we don't trust you as a society to do that.
Super frustrating in a borderline libertarian rant.
Accurate scales are very affordable nowadays. A $50 Gemini-20 can accurately measure in the milligram range with very little tolerance. The danger is probably more of people not keeping to the right dosages.