What stopped nanking mascara?

The production of Nanking mascara, a popular cosmetic product in the early 20th century, was halted primarily due to health concerns related to its ingredients, which often included toxic substances like lead and coal tar. As awareness of the potential dangers of these chemicals grew, regulations surrounding cosmetic safety tightened, leading to the decline of such products. Additionally, the rise of safer and more modern cosmetics contributed to the discontinuation of Nanking mascara.