Chemistry of skin: Skin types

There are a million different ways to figure out your skin type, but I’ve chosen to go with the Baumann skin type indicator (or BSTI). There is a quiz for this, but we can’t access it without a recommendation from a dermatologist, so we’ll just go with the concepts found in this assessment for these...

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Chemistry of skin: Sebum

Sebum can be our friend when it is protecting our skin from infection or fungi, protecting from friction, and reducing TEWL, but it can be our enemy when it’s causing us shiny skin and acne pustules! As you can see from this picture, sebaceous glands are located in the hair follicles of our body. The...

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Chemistry of skin: Trans-epidermal water loss (TEWL)

“Trans-epidermal water loss (or TEWL) is defined as a measurement of the quantity of water that passes from inside a body through the epidermal layer to the surrounding atmosphere via diffusion and evaporation processes.” (Wikipedia) This is a continuous process over which we have little control. It can increase due to disruption to the skin...

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Fun with chemistry: Preserving & re-using containers

I see suggestions all the time that we really don’t need a preservative in products we might be using ourselves, and I find that strange, as if using a microbe-free product should be a privilege we reserve for other people! (And a bit hypocritical, if you believe there’s something inherently bad about using preservatives. You...

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