Apply one pump over the face and neck.

How to gradually phase in a new vitamin A serum:
First-time Vitamin A users should start by using Ultimate A or RetiFol, then advance to Acceler-A after 3-6 months, monitoring tolerance. Those with sensitive skin may wish to remain on Ultimate A as the vitamin A product of choice.
Weeks 1 and 2: Apply new retinoid serum every 3rd night, alternating with less potent retinoid serum (if applicable)
Weeks 3 and 4: Apply new retinoid serum every 2nd night, alternating with less potent retinoid serum (if applicable)
From Week 5: Apply new retinoid serum every night

*Not suitable for individuals who are pregnant or lactating