Assalamualaikum. I bought the Vitamin C serum from Minimalist.It has 15% Vitamin C which is Ethyl Ascorbic Acid . It also has 2 antioxidants which is Vitamin E and Ferulic Acid which makes another 1%.
I used this Vitamin serum for 2 months. I had some bumps. The price of this Vitamin C serum is about Rm 36. I bought it from their shop on Shopee. It is a good serum.
Nowadays I have a bump on my forehead.No acne.Alhamdulillah.