O barato (e o não receitado) pode como tal sair caro, por isso cuidado com as compras na Internet/fornecedores/vendedores e até com os fabricantes (há marcas mais e menos conceituadas):
Herbal supplements for sport, slimming and erectile dysfunction 'pose serious health risk after experts find some contain illegal drugs'
Citando:
"MANY herbal supplements could be doing more harm than good because they contain hidden illegal drugs linked to serious health problems, experts warn. Over the counter herbal sports supplements and treatments for obesity and erectile dysfunction may include dangerous substances not listed on the label, researchers from Queen’s University Belfast found."
(...)
“We have found that these supplements are often not what customers think they are – they are being deceived into thinking they are getting health benefits from a natural product when actually they are taking a hidden drug.
“These products are unlicensed medicines and many people are consuming large quantities without knowing the interactions with other supplements or medicines they may be taking. This is very dangerous and there can be severe side effects.”
They said the survey “raises serious questions” about the safety of slimming products containing the drug Sibutramine. Sibutramine was licensed as the medicine Reductil until 2010, when it was withdrawn across Europe and the US due to its links with heart attacks and strokes. It also found a substance called DMAA found often undeclared in sports supplements.
(...) DMAA was taken off the market in the US in 2012 due to its links with elevated blood pressure, which can lead to heart problems.
(...) DMAA was taken off the market in the US in 2012 due to its links with elevated blood pressure, which can lead to heart problems.
Professor Burns said it was even more important that athletes know what they are taking as their careers rely on it. He said: “We are seeing all these cases of athletes being done for drugs when they didn’t know they were taking anything – that is why they shouldn’t eat anything that hasn’t been analysed.
“If manufacturers want to have a product that is miraculous they can tweak it pharmaceutical, under the counter as you might say, and it will work better than the natural herb but it might have other reactions to medication you are taking.”
Researchers also discovered tadalfil and sulfoaildenafil were frequently undeclared ingredients in products for erectile dysfunction.
When taken with other medicines containing nitrates, these drugs can lower blood pressure drastically and cause serious health problems."
