Can you combine iron supplements like K2 ferrous bisglycinate with elemental iron? If you’re dealing with iron deficiency, it’s important to consider the solubility of various iron tablets, such as ferrous fumarate and iron gluconate. Additionally, when taking iron, it’s essential to be mindful of the presence of calcium in calcium citrate, as this can affect iron absorption. To optimize your iron intake, remember to evaluate how calcium in calcium citrate interacts with different forms of iron, including K2 ferrous bisglycinate and elemental iron, especially if you’re experiencing low iron levels.