The Super-Absorbable CoQ10 preparations from Life Extension, formulated with d-Limonene, are purported to represent an enhanced absorption preparation due to the solubilizing effect of the citrus flavonoid limonene. Though there are apparently proprietary data to support this claim, it is relatively unscientific and unpublished. Nonetheless, in past we’ve had only positive experiences with Life Extension products, this one included. However, we remain undecided on whether there is indeed any enhanced benefit.