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How does ascorbic acid react with iodine?

When ascorbic acid reacts with iodine, the ascorbic acid is oxidized (looses electrons) and the iodine is reduced (gains electrons). As long as the solution contains ascorbic acid, the iodine is used up in a rapid. reaction with ascorbic acid, during which dehydroascorbic acid and iodide ion are formed.

What is the purpose of the iodine clock reaction?

The “clock reaction” is a reaction famous for its dramatic colorless-to-blue color change, and is often used in chemistry courses to explore the rate at which reactions take place. The color change occurs when I2 reacts with starch to form a dark blue iodine/starch complex.

How do I know if my vitamin C has 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.

Can I use vitamin C in the morning and niacinamide at night?

Now that we know it’s a perfectly safe combination, feel free to mix niacinamide and vitamin C to your heart’s content. However, if you still feel nervous about combining the two ingredients on your sensitive skin, you can always use niacinamide in the morning and vitamin C at night, or even alternate days.

Why can’t you use vitamin C and niacinamide together?

Several blogs, and even some beauty magazine articles, state that while the two ingredients are great on their own, combining them creates a two-fold problem: One, it neutralizes the effectiveness of both ingredients, and two, it might create a substance (nicotinic acid) that leads to skin redness.

What comes first niacinamide or vitamin C?

Take Niacinamide + Vitamin C: this pair makes an especially powerful combination. Niacinamide is a relatively new ingredient on the skincare scene. It’s a form of vitamin B-B3, to be specific. In the same vein as vitamin C, niacinamide is a powerhouse ingredient.

Should you use niacinamide or vitamin C first?

Plus, Zeichner also suggests that it’s completely fine to “layer your niacinamide-containing product along with your vitamin C serum” since the “ingredients complement each other by improving skin radiance and evening skin tone and texture.”

What should you not mix with niacinamide?

Don’t Mix: Niacinamide and vitamin C. Although they’re both antioxidants, vitamin C is one ingredient that’s not compatible with niacinamide. “Both are very common antioxidants used in a variety of skincare products, but they should not be used one right after the other,” says Dr. Marchbein.

Can I use two products with niacinamide?

You can use multiple niacinamide-containing products in your routine, and it will still be non-sensitising as this ingenious B vitamin is well tolerated by all skin types. It’s even suitable for use by those with sensitive or rosacea-prone skin.

Can vitamin C and hyaluronic acid mix?

Combining the two makes for a great all-in-one skin care step. “Hyaluronic acid and vitamin C are commonly used together because they complement each other to hydrate, protect, and repair aging skin,” says Zeichner.

Do you apply vitamin C before hyaluronic acid?

If you are applying a Vitamin C serum and hyaluronic acid (HA) separately, it’s suggested that you apply the Vitamin C first, and then add the HA afterward in order to help fortify the skin’s barrier and lock in the moisture.