Vitamin C Serum with 3-O Ethyl Ascorbic Acid.

"I would personally recommend the Boots Vitamin C Serum. This comes in at a seven percent concentration of a stabilized form of pure vitamin C. That seven percent concentration is going to give you really good results. That's a robust concentration of vitamin C but it's not sky high, so you're not going to get a whole lot of side effects and sensitivity, especially because this is formulated with some hydrating and calming and soothing ingredients too. This really does pack a punch, so don't think because you're going for a lower concentration you won't see results. You absolutely will, but you'll do so with a whole lot less side effects. The reason I'm calling this out is it's five pounds here in the UK. You can walk into Boots stores, buy it online, and get those really affordable results. It's also now available at Target. It's a truly international product that I think just about everyone could benefit from."

"When seeking out vitamin C serums, the more coveted form you're hoping for is L-ascorbic acid, but it's very challenging to formulate in a way that remains stable and gets into the skin. Three-O ethyl ascorbic acid may help act as an antioxidant, so it's not a bad ingredient, but it hasn't been shown to actually get into the skin and convert to ascorbic acid. People do develop allergy to it."

"The Boots Vitamin C and the hyaluronic acid line, the sleep mask, the hydrator, and the serum have been amazing. Specifically, the little serums from Boots. I like to mix them and I can apply them in layers. That has worked really well for my skin this year, especially since I've been trying out the vitamin C recently and I really really like it on my skin. Boots is making skincare accessible and affordable and inexpensive and at Target. Like everything is under 10. I love the Ordinary and I love the Inky List, but you can't even say that their products are under 10. I agree I understand the sizing can be smaller, but slam dunk. They did something right and I'm so glad that it is on shelves near me."