Vitamin C serum/cream

[coffeemilk]

Please can you recommend a good vitamin C product? A serum or cream anything that has a good amount of vitamin C which actually makes a difference to skin tone. I tried DIY but struggled to keep it from turning orange and had to make new batch every 3 days. Also something that's not too expensive (upto 20-30£)

[mintbiscuit]

Skinceuticals vit c is the best imo. £££ for normal bottle but you can get samples on ebay which work out way cheaper.

Cheap alternative is OST c20 serum. Korean but you can buy on amazon I think or ebay.