I have used these serums consistently for more than 3 weeks - These serums are made to protect your skin from the harsh South African sun and cold. I love that they are affordable yet super effective. The Vitamin c is a light serum that absorbs so easily, protects and brighten the skin. Hyaluronic acid instantly plumped my skin and kept it looking hydrated through the day. And the Retonoid serum is a lovely oil based formula that helped to brighten my skin and assist with my hormonal breakouts. I highly recommend it to anyone looking to boost their skincare routine and for more radiance, smooth and plump skin!