Sona D2000 Vitamin D3 2000IU (120). Sona Vitamin D 2000. Sona D2000 provides 2000IU or 50µg of vitamin D per capsule, which is important for the maintenance of bones and teeth, normal muscle function, neurotransmission and cell division.. Vitamin D is also important for the absorption and utilisation of calcium and phosphorus, the maintenance of normal blood calcium concentrations, the normal function of the immune system and inflammatory response.