https://www.vice.com/en_us/article/wx5z5y/why-is-the-intellectual-dark-web-suddenly-hyping-an-unproven-covid-treatment

Some time ago, a furious debate erupted across the United States: Do people have the right to promote, prescribe, and use an unproven drug for a serious illness? Many asked an attendant question: Was there a vast and sinister conspiracy to keep that drug’s stunning efficacy hidden from the American public? 

The product was called laetrile. It was derived from apricot pits, and throughout the 1970s it was championed by a small but extremely loud group of people as a suppressed and miraculous cancer cure. It was not, as it turned out, a cure at all: Laetrile, also known as “Vitamin B17,” showed little to no anti-cancer activity in a large National Cancer Institute study, and multiple studies also warned that taking too much of it could lead to cyanide poisoning. Still, thousands of Americans, including actor Steve McQueen, flocked to clinics in Mexico for treatment before the FDA declared the product illegal in 1980. Since then, it’s made several comebacks online, each time marked by a chorus of people claiming that its real effectiveness has been deliberately concealed by unscrupulous medical Powers that Be.