EASY ON THE STOMACH: melts? Plant Based Iron Supplement is loaded with Acerola Cherry for natural Vitamin C which boosts iron absorption, without causing any stomach issues or constipation. It contains Spinach ? one of the best sources of iron, Swiss Chard ? a nutritional powerhouse loaded with vitamins and minerals, and Acerola cherry, the most potent form of Vitamin C which enhances iron absorption by over 50%. Vitamin C also helps build immunity in your body.