Natural light is your best friend when it comes to shade matching. Douglas loves using a mix of window light and a ring light to get a true read of skin tone and undertone. He’ll position clients a ...

Plenty of beauty products are on sale right now, but these Wirecutter-tested picks are actually worth the money. No more post ...

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Pulse oximeters are widely used in hospitals and clinics to monitor blood oxygen levels. These small, noninvasive devices ...