Dr. Leslie Baumann is the director of cosmetic dermatology at the University of Miami's Leonard Miller School of Medicine. She answers your questions about cosmetic dermatology.

Click here to ask Dr. Baumann a question.

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SKIN DEEP

Exfoliating products aren't for everybody

Q: I know that some skin types shouldn't use abrasive exfoliating products -- but which skin types? A: You're absolutely right. Many people with sensitive skin should not use abrasive exfoliating scrubs, as the friction can increase redness and further compromise an impaired skin barrier.

SKIN DEEP

Claims may be true, but they're still hype

Q: What are your thoughts on these new expensive creams that claim to have ''stem cells'' in them? A: There are actually two types of claims that these ''stem cell'' creams make: the first is that they contain stem cells, and the second is that they stimulate stem cells already in the skin.
SKIN DEEP

Sculptra promises to last

Sculptra, an injection that stimulates skin cells to make collagen, was approved by the FDA in July to treat facial wrinkles.
SKIN DEEP

Will Botox or Dysport improve acne?

A recent study was published in the Journal of Drugs in Dermatology claiming that Botox is an effective treatment for acne. Now all the beauty magazines are writing about this and I want to set the record straight.
SKIN DEEP

Add some spice to your summer

Summer is the time to spice it up. Many spices contain strong antioxidants that help mitigate the damage caused by sun exposure. Antioxidants help prevent skin cancer by reducing inflammation, decreasing free radicals and preventing DNA damage caused by sun exposure (known as thymine dimers).
SKIN DEEP

Does your skin need to detox?

Devotees of detox diets and spa treatments have long insisted that fasting, slathering yourself with mud and mineral salts or taking certain types of oral supplements and vitamins can remove chemicals, pollutants and other vague ''impurities'' from the body. Now beauty companies have jumped on the bandwagon, claiming that their products also have detoxifying benefits.
SKIN DEEP

When to take your child to see the dermatologist

There are a few skin changes that you should never ignore, even in children. Take your son or daughter to a dermatologist right away if you see any of these:
SKIN DEEP

The benefits of olive oil go beyond salad dressing

Ancient Greeks bathed with olive oil, and today the practice still holds up to the scrutiny of science. Olive oil contains at least four types of antioxidants, which neutralize damaging free radicals that can lead to skin aging and skin cancer.