Tuesday, January 26, 2010

Green tea extract: Some other stuff!

After three days of information about green tea, surely we've covered everything? What more could we include? We've covered caffeine, proanthocyanins, and tannins and catechins. Are there still more interesting things to be found in green tea?

We find selenium behaving as an anti-oxidant and anti-inflammatory in green tea. It is a co-factor in the formation of an important protective enzyme (gluathione peroxidase) and it inhibits inflammation after UV exposure.

We also find methyl salicylate at about 0.6%. This is both an anti-inflammatory and a warming agent (it's found in wintergreen as well).

Quite a few studies have shown that the application of green tea extract before exposure to the sun will produce less damage to the skin, less redness, and less inflammation compared to the control group. Other studies have shown the application of green tea extract to the skin for 10 minutes, 3 times per day, could help people with skin damaged by radiation (improvement was seen in 16 to 22 days). The anti-oxidants in green tea may help with the symptoms of rosacea and may prevent retinoid dermatitis. One study showed it might help with pigmentation disorders, like vitiligo.

So what does all of this mean for us as formulators? Well, I think we can see that green tea is awesome, but how specifically awesome is it and how can we get that awesomeness into our creations?

Powdered green tea extract is easy to find from our suppliers. Use it at 0.5% to 1% in the cool down phase of your recipe. Get a little warm water, mix the green tea extract into it, and dissolve well before adding. You can also get liquid green tea extract, which is pre-dissolved into something like glycerin or propylene glycol, which you'd add at 5% to 10% in your creations. As liquid green tea extract can differ between suppliers, check to see their suggested usage rates.

You can add green tea extract into any of our water based creations. I like it in a toner, summer spray, lotion...well, just about anything! Join me tomorrow for fun formulating with green tea extract.


Michelle Squyars said...

Can you make actual green tea and use in in lieu of the water in your water phase for lotion? Would it provide the same benefits as the extract or would it be to small of an amount to notice any changes?

Kki said...

Hi Susan! Thanks for all your amazing info! I have the same question as Michelle: could I use f
Green tea instead of an extract? If not, why do you think? where do you recommend I get organic extract? Thank you so much!


Klara said...

Hello again! I forgot to ask if there is a specific grade of extract I should use. I have found organic extracts at the health food store, but not at cosmetic formulator shops so I was wondering if there is a molecular or quality difference between the non organic stuff at our supplier shops and the organic stuff at health food stores.

Thank you!


Susan Barclay-Nichols said...

Hi Kki. Check out the FAQ for this post - why we can't use tea in our products. I don't know where you can get an organic tea extract. I've never seen a cosmetic grade before.

Hi Klara. You want to use cosmetic grade ingredients in our products. There are differences, and we want to use something that has been formulated to work with our products.

ladybug21 said...

Hi Susan,
Thanks for your blog - I just found it and cant believe the amount of information! I started making lotions and creams and I recently bought green tea extract (powdered) without fully understanding what to do with it. When I called customer service, they suggested a tincture. In your blog, however, you suggest simply mixing the extract with warm water from the water phase. This sounds good (and easier!) to me!

Is there a ratio i should follow? Xgrams with Xml of water?


ladybug21 said...

ahh... I see my answer in your post. 0.5-1% in cool down.