Can I use a vitamin c serum with the Maysama Green rooibos before red light?

As long as your Vitamin C serum is water-based, you can use it before your red light therapy treatment, together with your Maysama serum. If, on the other hand, your Vitamin C serum is oil-based, we recommend you apply this after your red light treatment as some oils can hinder light penetration. 

If you are unsure whether your Vitamin C serum is water or oil-based, simply check the first two ingredients on the INCI list. If the first ingredient is water or glycerine, then this is water-based.

Assuming your Vitamin C serum is water-based, then the order of application of your serums should follow these two rules;

(i) low pH to high pH

(i) thinnest to thickest

If you are using L-Ascorbic acid, then layer this before your Maysama serum because the pH will be lower than your Green Rooibos Serum. If you are using any other Vitamin C derivative, the pH is likely to be higher, so it should be layered after your Maysama Green Rooibos serum.