Does nicotine band invalidate fasting?

Nicotine band does not invalidate fasting. What invalidates the fast are the materials entering into body through normal ways and sexual intercourse. Materials put on body such as ointment and cream are absorbed by skin pores and capillary veins under the skin and mix with blood. But this absorption is too slow and low in amount. In other words, this process is not considered as eating and drinking, or taking nutrition (See. Marghinani, al-Hidayah, II, 263-264; Kasani, Bada’i, II, 98; Ibn Abidin, Radd al-Muhtar, III, 366-367).

Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS

Do Applying Make Up And Dying Hair Invalidate The Fast?