Vitamin C recommendations please!

I started with this vitamin C serum. It has a 5% concentration, so it's suitable for beginners. If it's still irritating for your skin, you can mix it with a hydrating serum. Thanks to its lower concentration, it doesn't oxidise as fast as others, but you should keep it away from light (I keep it in its original packaging).

if you are using l-ascorbic acid, you will gain a warm sensation. It is the purest form of vitamin c but at the same time can be oxidised easily and not that stable too. you can try vitamin c derivatives too, more stable, less irritation but efficacy is lower than l-ascorbic acid

I would start at a lower concentration and slowly incorporate it in your routine. if you're using other actives like Retinol or BHA I would stop using it for a week when you introduce your Vit C. After that I would the Vit C in the AM and Bha, ahas, retinol in the PM.

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