Choline chloride is a high potency, synthetic source of choline. Cobalt is a trace element, an essential mineral and integral part of vitamin B12. Copper is a trace element, an essential mineral that can be toxic in excess. Copper carbonate is a natural form of copper. Copper gluconate is a synthetic form of copper.
Copper sulfate is a synthetic form of copper.
Ferrous sulfate is a synthetic, high-potency source of iron. Folic acid is a B vitamin found in yeast or liver. Inositol is a B complex vitamin. Iron oxide is a natural source of iron. Magnesium oxide is a natural source of magnesium.