Carbon-complexed with Micro Carbon Technology®, CDFA (California Organic) and OMRI-Listed Fertilgold® Mg is an organic magnesium nutrient. Fertilgold® Mg ensures maximum assimilation of magnesium, which is essential to photosynthesis. Magnesium is also an activator of enzymes involved in the production and use of ATP—which plays a key role in respiration—and is needed for the creation of DNA and RNA.