Taking vitamin C after you already have cold symptoms doesn't make your cold shorter or less severe compared to taking a fake pill.

Taking vitamin C after you already have a cold doesn't really help you get better faster or feel less sick, according to several big studies.

Taking vitamin C pills every day might make your colds less severe, according to some studies that looked at healthy people.

Taking vitamin C regularly might help you get over a cold faster—about 8% quicker for adults and 14% for kids, according to a big study.

Vitamin C helps reduce bad cold symptoms a lot (by about a quarter), but doesn't really help with mild cold symptoms. This is based on studies of over 2700 colds.

Taking vitamin C pills every day doesn't really help prevent colds for most people, according to studies with thousands of participants.