Vitamin C is a very pale yellow color in its liquid state and nearly odorless at the time it is manufactured. As time goes by, exposure to heat, light and air causes oxidation. It is only after going through the oxidative process that the serum changes its tint to a darker yellow then eventually orange. 2 мар. 2012 г.
Is vitamin C serum supposed to be clear?
Fresh active vitamin c serum should be clear or slightly whitish, but not yellow or brown. You can pay anywhere from $25 to $150 an ounce for a vitamin C product, and even the expensive brands oxidize if they're made from L-ascorbic acid.
Is vitamin C serum supposed to be white?
DO look at things like smell, color, and consistency of your vitamin C serum to make sure it hasn't oxidized. Color: Your serum should be white, clear, or a light champagne color. If the product is dark or cloudy in color, the serum may have oxidized and should be returned or gotten rid of.
Is vitamin C supposed to be yellow?
When in the vitamin C is in high concentration, the serum will have a yellowish color, but as it oxidizes, it will turn brown/orange. Cosmetic vitamin C preparations that have discolored should be discarded as they have already oxidized and cannot provide skin benefits.
How do you know if your vitamin C is oxidized?
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.
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