My eating plant based foods, drinking lots of pure as I can get water and taking Rainbow Light-Food-Based Calcium, then just ONE MONTH LATER I had blood work done. The calcium can be absorbed through the roots, or in the leaves as a foliar spray, and works to strengthen cell walls to prevent cracking, as well as cure/prevent blossom end rot. Also, some may have a magnesium (Mg) suplement as well. Indeed I do feel stronger. How to apply: Calcium in soil plays a role in plant cell membranes and walls, as well as the cell division process. When you feed your plants, you can add plain yogurt at 2 oz per gallon of water, and molasses as well, for more calcium plus some carbohydrates, at a rate of 2 oz per gallon of water. Tomato plants require much more calcium than other fruits and vegetables. Eggshells work well, but take a while to break down, so the calcium is not available to the plant right away. So the plant relies on the process of transpiration in which the plant roots take up the soil solution (which contains the needed calcium), transports it to new growth where the calcium is used and the excess water vapor escapes out through holes in the leaves called stomata. The way to healthy plants begins with nutrient-rich soil. My Family was already taking Rainbow products for years and I found this Calcium. . Soil that is not already rich in calcium will allow disease such as blossom end rot to infect your tomato plants. This will help to green up the plant. Calcium is not mobile within the plant. Therefore, it is necessary to have a constant supply of calcium for continued growth. My calcium is up to a 9 which I was trilled about. * The tablets supposed to be given to humans have Iron, Calcium, Magnesium etc in the form of suitable salts like Ferrous Sulphate etc. Eggshells contain 95 percent calcium carbonate making them an ideal calcium additive. Since calcium mobility in plants is limited, calcium deficiency will appear in younger leaves (die back or burns) and in fruits (blossom end rot, bitter pit), because they have a very low transpiration rate. The salts may further be in complex association with other organic molecules and dispersing agents. The Best Way to Put Calcium in Garden Soil. Blossom-end rot in certain crops -- often tomatoes (Solanum lycopersicum), bell peppers (Capsicum annuum) and eggplant (Solanum melongena) -- is sometimes caused by a calcium deficiency in the soil. It moves through plants with the water they absorb through their roots. Perform a soil test to discover if your soil is deficient in calcium. Antacid tablets are made of calcium carbnate (CaCO3).