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"A word about vitamin A. Some experts (usually non-scientists) include various forms of vitamin A (such as retinol, retinaldehyde and retinyl palmitate) among retinoids. Physiologically speaking, vitamin A is not a retinoid because it does not interact directly with retinoid receptors. Cells have to first convert vitamin A to retinoic acid (i.e. to tretinoin or other retinoid). The rate of such conversion is low and varies significantly among individuals. What does this mean in practice? Low strength topical vitamin A formulations are usually ineffective - not enough of vitamin A is converted into a retinoid. Stabilized, high strength topical vitamin A may be effective, but due to variability in conversion rates the results are far less consistent than with true retinoids and the side effects may be almost as significant. For people who cannot tolerate or cannot afford retinoids, a well-selected vitamin A formulation may be worth a try (see our articles on retinaldehyde and retinol). Otherwise, a retinoid is likely to deliver a better performance."

Quote from Smart Skin Care - Intelligent Rejuvenation Through Science



 

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Thanks Fawnie for that insight. the Capsules of Vit A I have are 5000units. Its just that you often hear different oils like maybe Rosehip have vit C and A, so I thought maybe the concernration of it from a capsule would be more potent and effective.
They do, you're right. But you just won't get the same effect as fast or as dramatically from putting either vit A oil or rosehip seed oil on your face that you will from using the forms of C and A that are readily usable by the skin for purposes of exfoliation and collagen building.

But if you are looking for a gentle way to do it, then those oils might be right for you. It just takes so long for them to be converted to the forms for the receptors in the cells to use.

You could go on to read the article they suggest to see if it sheds any light. And of course, everyone is different so you could always try it. The article does say that you could still get irritation from the capsules though.

HTH and let us know!



 
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