Vitamin C may help treat colds but might not prevent them. Taking 1 to 4 grams of vitamin C per day for five days may help shorten a cold. Adults should not exceed 2,000 milligrams of vitamin C per ...

Abstract: This study is intended for those with speech problems, hearing loss, or deafness. For those who are hard of hearing or deaf, sign language is unique in that it serves as their primary and ...