High-frequency (Tesla) current in a facial machine is primarily used to:
a.Produce a mild germicidal and warming effect that helps treat oily or minor blemished skin
b.Push acidic ampoules into the skin through iontophoresis
c.Permanently remove hair follicles by electrolysis
d.Provide deep muscle contractions for facial toning
Explanation
High-frequency (Tesla) current is a rapidly oscillating AC. It generates small amounts of ozone and gentle heat at the glass electrode, which has a mild antiseptic and stimulating effect on the skin.
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