Sheet masks, creams, gels, serums and eye products that are meant to sooth should be refrigerated, because the cool environment can extend the life of your products, and the reduced temperature of the product itself will provide additional soothing and smoothing benefits when you apply the product.
Any product that is based on Vitamin C, such as Vitamin C serums and the like, should be stored in the fridge. As Vitamin C is structurally unstable, it will last longer when kept in a controlled environment away from heat and light.
Nail polish can go gluggy and separate if it gets too warm or gets too much sunlight. Keep it in the fridge so it goes on smooth every application.
If you have other skincare products that are 100% natural, have live cultures in them or aren’t used often, keep them in the fridge to preserve them as long as possible.
Never put oil-based products in the fridge. The cold temperatures can make oils lose their consistency or thicken.
Most make-up shouldn’t go in the fridge. Powders need to be kept clear from moisture.
Keep any clay masks out of the fridge, as they can harden.
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