The "snow" in the Wizard of Oz movie was 100% pure asbestos.
Not only that, the Scarecrow stuffed his outfit with asbestos to prevent it from catching on fire.
The original Tin Man had his face painted with pure aluminum dust, which led to respiratory problems that sent him to the hospital. The film producer decided to replace him with actor Jack Haley. However, Haley was not immune to the toxic makeup, which caused an eye infection and made him miss four days of filming.
Margaret Hamilton as the Wicked Witch of the West also put on extremely toxic makeup that contained high levels of copper. Her makeup artist, Jack Young, once said, “Green is toxic because it’s made with copper. Every night when I was taking off the Witch’s makeup, I would make sure that her face was thoroughly clean. Spotlessly clean. Because you don’t take chances with green.”
Once she put on her makeup, Hamilton was forced to stick to a strict liquid-only diet to prevent her from ingesting any of the toxic paint.
Judy Garland was only 16 years old when she started filming the Wizard of Oz. On set, she was shunned by the Scarecrow, Tinman and the Cowardly Lion due to jealousy. Her only friend was Margaret Hamilton.
Garland was also placed on a strict diet which consisted of chicken soup, coffee and 80 cigarettes a day. She then became reliant on amphetamines in her late teens and at 19 she collapsed from exhaustion. Instead of being told to rest, doctors prescribed her more amphetamines.

Now you know the rest of the story!!