A lot is written about Vit.c would be good for your skin. Well it is!!! That's why this DIY! Everything is available at Holland and Barrett. Distilled water is available for sale at the Kruidvat. Create your own anti-aging Vit.c serum Here's what you need: 33% Serum - 1 teaspoon L-asorbic acid (vitamin C) or camu camu powder - 1 tsp distilled water - 1 teaspoon of vegetable glycerin 5% Serum: - 1/4 tsp Vit.C powder - 4 teaspoons distilled water - 3/4 tsp glycerin 10% Serum: - 1/4 tsp Vit.C powder - 2 teaspoons distilled water - 1/4 tsp glycerin 15% Serum: - 3/8 tsp Vit.C powder - 2 teaspoons distilled water - 1/8 tsp glycerin 20% Serum: - 1/4 tsp Vit. C powder - 3/4 tsp distilled water - 1/4 tsp glycerin Mix the ingredients well and make sure no lumps are formed. Put it in a dark bottle. Apply it under the night cream every night. You can keep the serum for 1 week. You can also replace glycerin for Aloe vera. And you can also add 2 drops of vit E and if you want to. L-asorbic acid (vitamin C), camu camu powder and vegetable glycerin can be purchased at a health store such as De Tuinen and distilled water can be obtained from the Kruidvat.