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.
A sore throat caused by a cold can be plenty painful, but it usually goes away after a couple of days. Strep throat tends to hurt worse and last longer. The pain may be so bad that it's hard to swallow. In some cases, strep may cause nausea, a lack of appetite, or pain in your head and belly.