What temperature should vitamin C serum be stored at?
C º22 does NOT need to be refrigerated and is very stable at room temperature. However, it does not hurt the efficacy of the product in any way to keep it in the fridge and will extend the rated 12 month shelf life.
Should vitamin C serum be stored refrigerator?
Vitamin C and retinoids are heat and light sensitive, meaning they break down and oxidize faster if stored in places with lots of light or heat. This is why most vitamin C and retinoid serums are packaged into dark bottles. To ensure longer product life, these should definitely be stored in the fridge.
Does vitamin C serum go bad?
Expiration time
Many serums are yellow, but if your product takes on a brown or dark orange hue, it’s time to toss because it’s gone bad. If your serum starts out clear and turns yellow, that’s also a sign it’s oxidizing and will be less effective.
Can you use vitamin C serum everyday?
Vitamin C serum is typically applied once or twice per day. A good rule of thumb is to cleanse, tone, apply vitamin C serum, and then moisturize. It can be safely used in conjunction with other active ingredients, although use alongside niacinamide may render vitamin C less effective.