Harga, Methycobal, Methylcobalamin, 250, 500, mcg, indikasi, kapsul, ampul, inject, vitamin, b, 12, kandungan, cara, pemakaian, dosis, obat, keras, resep, dokter, jual, beli, tablet, salut, manfaat, khasiat, dewasa, suntik, optimal, rutin, apotek, minum, jenis, optimal