Actually, I was curious about it!
All about Vitamin C

Things you think you know but don't really know,
I'll teach you about vitamin C beauty!

"Pure Vitamin C" and
"Vitamin C derivatives"
What's the difference?

Vitamin C is "pure vitamin C" and
They can be divided into two types: "vitamin C derivatives."​

◆ Pure Vitamin C

As the name suggests, this is pure vitamin C (ascorbic acid). It immediately exerts its effects as vitamin C from the moment it is applied. For this reason, it is also called "active vitamin C" or "fast-acting vitamin C."​

◆ Vitamin C derivatives

This ingredient is made by chemically modifying pure vitamin C to stabilize it.
It is more stable and easily absorbed into the skin than pure vitamin C, and comes in various types.
Because the chemically modified portion is cleaved by enzymes in the body before it can function as pure vitamin C, it takes time to gradually exert its effects.

Exposure to ultraviolet rays generates reactive oxygen species in just a few minutes, which cause a series of skin damages and lead to blemishes and wrinkles.
To deliver the antioxidant properties of vitamin C to where you want them most quickly, fast-acting pure vitamin C is ideal.

What are the effects of vitamin C on the skin?

The effects of vitamin C on the skin can be broadly categorized into the following six points:

  • Preventing blemishes (inhibiting melanin synthesis)
  • Promote cell turnover
  • Promotes collagen synthesis
  • Lightens the color of existing stains*
    (Lightening of melanin pigment)
  • Antioxidant effect
  • Normalization of keratinization

* Monomeric melanin

Is it okay to drink it?
Is it better to apply it?

Humans cannot produce vitamin C on their own,
Taking supplements, applying skincare products,
Both are important.
However, if taken orally,
Because it is preferentially distributed to and consumed by all organs in the body,
If you want to deliver it directly to your skin, "applying" it is more efficient.

When is the best time to use skincare products containing vitamin C?

To maximize its effectiveness against UV rays, incorporate it into both your morning and evening skincare routines.
Many people may use it at night as intensive care after being exposed to a lot of UV rays, but there is also data suggesting that it is better to use it in the morning as well.

Rohto Pharmaceutical's own
Vitamin C technology

20 years of research have overcome the weaknesses of pure vitamin C.

Fast-acting pure vitamin C.
Even pure vitamin C,
Actually, it has a weakness...!

It does not penetrate the skin easily.

Pure vitamin C is water-soluble.
Because it does not easily blend into the skin surface, which is covered with a sebum film,
It's difficult to get it to penetrate.

fragile

Pure vitamin C is very delicate.
It is vulnerable to water, air, light, heat, oxygen, etc.
Unable to exert its effect
They tend to break easily.

Through years of research, we have succeeded in stably incorporating pure vitamin C and ensuring its penetration into the skin!

While its effectiveness is well-established, pure vitamin C is extremely difficult to handle.
First, in order to stably incorporate pure vitamin C into skincare product formulations, technical expertise and ingenuity are required regarding the combination and quantity of ingredients.
Furthermore, because pure vitamin C is water-soluble and not easily absorbed by the skin, techniques and methods are needed to ensure it penetrates the skin.

Rohto Pharmaceutical has been researching vitamin C for approximately 20 years, and has succeeded in stably incorporating pure vitamin C into its formulations, allowing it to penetrate the skin while maintaining its effectiveness.
This is a technology unique to Rohto Pharmaceutical, and they have filed numerous patents related to vitamin C.

Skin Concerns Column

Learning about proper skincare