03 Mar 2021 --- DSM’s fast acting vitamin D supplement, ampli-D, is hitting Australia’s market following regulatory approval issued last year. The launch of the supplement – which acts on the body three times faster than standard vitamin D – is an answer to global calls for immune strengthening dietary ingredients. Ampli-D is a manufactured form of calcifediol or 25-hydroxy, a pheromone produced in the liver through the hydroxylation of vitamin D.