grapeseed extract. It is claimed to be a good anti-oxidant and free radical scavenger, but might also offer skin lightening, skin brightening (not sure how to define this), anti-inflammatory, anti-fungal, and skin damage repair properties to our products.
Resveratrol is a very good anti-oxidant and free radical scavenger. It is a great anti-inflammatory, and it can inhibit cell growth. It is advertised as reducing the signs of aging, and it does this by ameliorating the effects of UVB caused skin damage.
Resveratrol was applied to the bodies of hairless mice prior to UVB radiation and it was shown to reduce the damage caused to the skin from acute UVB exposure. We can't always extrapolate from animal studies, but other studies are so promising that cosmetic companies are already including this in a lot of post-sun products. It is showing promise as a wound healer, anti-fungal, and anti-viral - but don't go using this in place of preservatives!
There are quite a lot of studies about this ingredient happening right now. Click here for the study on skin cancer and inflammation, click here for a study on the effects of resveratrol on herpes viruses in mice,
If you're using resveratrol extract in your products, I'm not sure how much to use as I haven't been able to find any suggested amounts. It's soluble in alcohol, so you'll have to dissolve it in denatured alcohol or another form of ethanol before adding it to your cool down phase. It comes in a white powdered form if you get this version of the extract.
Be careful using resveratrol or grapeseed extract with other exfoliating extracts, like papaya, white willow bark, honeysuckle, and others and with things like AHAs because you don't want to use too many of these ingredients at one time as it might make your skin very sensitive!
The only place I've been able to find the resveratrol extract is at Bulk Actives, where it's $8.45 for 5 grams. I use grapeseed extract in my products, which I buy from Voyageur Soap & Candle at $3.70 for 10 grams. (Feel free to add information about other suppliers in the comments...but no ads!)
Disclaimer: I've never ordered from Bulk Actives, so I can't speak to the quality of their products or service. I buy most of my ingredients at Voyageur, and I love them. They offer me huge discounts and freebies for my youth programs, so I'm a huge fan of this supplier!
Join me tomorrow for more fun formulating with cosmeceuticals!