Zinc oxide is a powdered mineral that sits on top of the skin, scattering, reflecting, and absorbing UVA & UVB rays. Although zinc oxide is the safest and most effective active sunscreen ingredient, the best protection from the sun is to seek shade and cover up with clothes and a hat.
Story at-a-glance 1  -. With immediate and antibiotic-free treatment, strep throat can improve in two to five days, up to a week. 2  Immediate treatment of strep throat is very crucial not just for quick recovery, but because an untreated case of strep throat can lead to further complications.
Most people with strep throat are contagious until they have been on antibiotics for 24-48 hours. You should stay home from school, daycare or work until you have been on medications for at least 24 hours. Get a new toothbrush after you are no longer contagious, but before finishing your antibiotics.