I think you have to say something like "gentler, not over-drying" "mild drying effect", etc. - not fat-burning, though.

# Red Clay contains a high amount of silica and iron and is suitable for skincare and cosmetics. It's drawing action is good, but not as strong as green clay.
# Rhassoul Clay is is mined from beneath the shafts of the Atlas Mountains. It has detoxifying, cleansing, degreasing and astringent properties.
http://www.body-systems.net/ingredients_dictionary.php