Monday, August 23, 2010
Esters: Super Sterol esters
Our stratum corneum lipids contain cholesterol, about 20% to 25% of the lipids are cholesterol and another 5% to 10% are found as cholesterol sulfate. You'll also find cholesterol in our sebum. C10-30 cholesterol esters have a natural affinity for our skin as the cholesterol is such a big part of our natural lipids, so it's a good skin conditioner and moisturizer with repair abilities.
It's soluble in oils and insoluble in water, but it can absorb up to 50% of its weight in water, like lanolin and has some emulsifying properties.
I've used this before in a lipstick base. Although it felt very nice on my lips - one of my favourite recipes for a lip balm - it was a little soft and needed more waxes. Because it has no flavour, it's a great addition to a lip product, and the adhesion will help keep your colour on longer!
Its suggested use is from 2% to 10% but it can be used at up to 100% in a creation (although at that point, you're really just re-bottling the product!). As this is a good skin repair product, consider using it in your facial serum for dry skin, in a whipped butter or lotion bar intended for chapped skin, or a balm. You can include it in your lotions and creams or any other emulsified product as you would another oil or ester - this would be fantastic in a facial moisturizer or a product intended for really trashed skin. This would be fantastic in a product intended for your nails - a cuticle balm or lotion - as it contains lanolin.
Join me tomorrow for more fun with esters when we formulate with Super Sterol esters!