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Tretinoin vs. Ascorbic acid

Retin-A (tretinoin) is a retinoid medication that's used to treat acne in adults and children 12 years and older. It's available as a cream or a gel that's applied onto the skin once a day. Side effects include skin irritation, redness, and peeling. Your acne might get worse at the beginning of treatment, but it should get better as you continue using the medication. You must have a prescription for Retin-A (tretinoin) from your primary care provider or dermatologist; this medication isn't available over the counter.

• Acne

• Skin peeling or discomfort
• Warm feeling or stinging after applying
• Skin redness
• Sensitivity to sunlight (sunburns)
• Worsening of acne in the first few weeks of treatment

• Sunburns
• Skin irritation in extreme weather
• Skin reactions

Vitamin C (ascorbic acid) is a dietary supplement that's available over the counter. It's typically used for people who aren't getting enough of the vitamin from the foods in their diet. The supplement commonly comes as tablets, chewable tablets, gummies, and oral liquid. While vitamin C (ascorbic acid) is important for several bodily functions, some of its suggested benefits (e.g., preventing colds) aren't clear. Side effects typically aren't common when you take vitamin C (ascorbic acid) supplements at recommended doses, but they're more likely to happen if you take too much.

• Dietary supplement

See Risks and Warnings.

• Toxicity from too much vitamin C