Applying one fingertip unit of retinoid nightly is a recommended method to ensure adequate dosage.

“And I always tell them hold up your finger and it should be from the tip of your index finger to your DIP joint. Oh my god. And that's how a fingertip unit. And if you can do a fingertip unit of retinoid every night, that's a great way to measure that you're getting enough on.”

“And that's how a fingertip unit. If you can do a fingertip unit of retinoid every night, that's a great way to measure that you're getting enough on.”