Vitamin C does NOT cause acne.
More Info: Though there are no studies that indicate that vitamin C causes acne, you may have a food allergy that is causing it.
Your Breakout May Be a Food Allergy
Though not a popular theory with many experts, there are several studies indicating that food allergies and sensitivity can cause acne breakouts in some. To determine whether your individual case of acne is induced or exacerbated by a particular food or food group, cut them out one by one and measure its effects on your acne.
Vitamin C Is Good for Your Skin
Because vitamin C produces collagen production, it can be beneficial to the skin when used both orally and topically. Studies have demonstrated that vitamin C has photoprotection properties by limiting the damage caused by UV rays, fights photodamage, has wound healing properties, and may help to prevent dry skin.
As far as acne is concerned, vitamin C used topically may also help to reduce and prevent inflammatory lesions caused by acne breakouts.
How Much Vitamin C per Day?
Vitamin C is a water-soluble vitamin that is excreted when taken in excess. The recommended daily allowance (RDA) for healthy men over 19 is 90 mg/day, and the RDA for healthy women of the same age is 75 mg/day. RDAs vary for children, smokers, the elderly, and those with certain medical conditions. Essentially, you should consult your doctor to see how much vitamin C is right for you. When you use vitamin C according to current recommendations, you can enjoy the health benefits that this vitamin offers without irritating your skin or promoting breakouts.