Beauty

[SilleeMee]

That makes sense @Porcelain . The different layers of skin are affected differently when using retinoids...got it.

[Love2Laugh]

My understanding is that retinoids do NOT thin the skin. According to Dr. Baumann,

"Note that uneducated skin care specialists often claim retinoids thin the skin, but this is only a partial truth. Retinoids do thin the dead layer of cells at the surface of skin, but that is actually a good thing, because these dead cells makes skin feel rough and reduce radiance. And numerous studies show that retinoids actually thicken the deeper layer of skin, called the dermis, where wrinkles form."

I was ALWAYS under the impression that retinoids help to produce collagen in the skin which we need for that youthful plumping that we lose as we age which eventually causes wrinkles. 

[Harpa]

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@Love2Laugh wrote:

My understanding is that retinoids do NOT thin the skin. According to Dr. Baumann,

"Note that uneducated skin care specialists often claim retinoids thin the skin, but this is only a partial truth. Retinoids do thin the dead layer of cells at the surface of skin, but that is actually a good thing, because these dead cells makes skin feel rough and reduce radiance. And numerous studies show that retinoids actually thicken the deeper layer of skin, called the dermis, where wrinkles form."

I was ALWAYS under the impression that retinoids help to produce collagen in the skin which we need for that youthful plumping that we lose as we age which eventually causes wrinkles. 

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@Love2Laugh  It is nice to see your post!

This is my understanding as well! As a matter of fact, I am a perfect example. My skin is plump and resiliant with a nice smooth surface.

I think the key to using retinoids - with the purpose of boosting collagen - is to use low percentages, both in starting out and then maintaining.

I can see, though, that those who have certain sensitivies for whatever reason may not be candidates for using retinoids or for mixing certain ingredients. But there are other topical ingredients that produce the same effect.

In any event, I have no trouble using low percentages of mixed skin ingredients. The only thing I would not use together is copper peptides and L-ascorbic acid, and even then it wouldn't be harmful, perhaps just not as effective as using them separately.