Does a2 milk powder start with ferrous iron?

At first, a2 milk powder was iron-free. A2 to the initial formula came from a2 Milk Company, using pure A2 pasture milk source in New Zealand. As "the pioneer of A2 in protein", A2 Milk Company has more than 60 patented technologies in the world after more than 20 years of scientific research, and has developed a set of gene detection technologies to identify A2β- casein and A 1β- casein from dairy cows, raw materials, production and products, so as to ensure the purity of A2 milk. Is the only company in the world that only focuses on A2 protein products. Ferric pyrophosphate (ferric iron) was added to a2 milk powder from the beginning, instead of absorbing and utilizing better ferrous sulfate (ferrous iron).