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.
How long does strep throat usually last? Strep throat is a bacterial infection that causes soreness. It is caused by Streptococcal bacteria, and is common among children who are between ages 5 and 15. Occasionally adults get the disease, but the symptoms are mild. The symptoms are more severe in children, and worse than those of a regular sore throat.