We commonly use 2 different sources of Resvertrol extract depending on the time of year and availability of the raw material - a 50% extract and a 98% extract.
98% extract - pale yellow or white powder. We use 153.061mg of powder to provide 150mg trans resveratrol per capsule
50% extract - Reddish brown to yellow brown powder. We use 300mg of powder to provide 150mg trans resveratrol per capsule. Because we need more active ingredient this requires less non active and thus the finished product is more the colour of the active Resveratrol powder
The colour of the Resveratrol powder does not reflect the quality unless the colour is a result of the material being oxidised due to sun exposure. Rest assured, our resveratrol is naturally the colour it is meant to be and the colour is not affected due to sunlight exposure.