... If you have to obtain it illegally, question your mental health, or compromise your safety for a certain methodology to lose weight then that method is not a good one.
So, no I don't think any of the listed things are safe or should be utilized to aid in weight loss.
I don't think anyone is categorically offended. It's clear that you aren't overtly advocating addictive drugs to lose weight.
In the spirit of information sharing; I would however take issue with your legal/illegal mental health comment. The criteria for approving drugs is, as you may or may not be aware, a source of great debate.
Whether a drug is deemed legal or illegal, available by prescription or over-the-counter, does not account for it's safety nor does it speak to anyone's mental health for their decision to take it. Some will take a medicine simply because it's for sale, without any regard for the faulty system which led it to be there.
This is just one example, and superficial at that, but [link removed], marketed as a cold medicine, comes to mind. It's a strong and effective medicine which happens to have psychoactive ingredients. If you read the ingredients and potential side affects, few could help but wonder what the criteria for a "safe" and "legal" drug mixture is. Would you give your child LSD? Speed? Meth? No? Then why would you give your kid this "medicine"? Moreover, why would the government ever approve this specific elixir for sale, over-the-counter no less? The answer is money. The pharmaceutical lobby is very powerful.
Only recently, [link removed] changed their formula to make their product "more accessible to consumers". It turns out meth-labs were using this product to make meth and while the makers of Dimetapp were okay with that, the government wasn't. The formula wasn't changed because the previous one was deemed unsafe or illegal, rather because the government banned the "ease of access" to medicines which had the psychoactive ingredients hoping to curb illicit drug making. The formula still includes a type of addictive stimulant, but the meth-heads can't use it to make their drugs.
In short, I don't buy into the legal/illegal argument. The system and criteria for categorizing drugs is entirely faulty, driven by corporate greed, and shouldn't be used as a measure of mental health.
We don't question the mental health of people who implicitly trust powerful government agencies who work in co-operation with powerful, greedy, extremely wealthy corporations, do we? Or do we?
