Give Your Cells What They Need to Keep You Well Cell Salts are like multivitamins for cells, bringing balance back to your body by providing essential minerals vital to cellular health and function. This remedy is the great acid balancer. Heartburn, an upset stomach and indigestion are your clues to a Nat Phos deficiency. Give your digestive system the help it's asking for by taking Nat Phos. Uses Temporarily Relieves: Indigestion. Gas. Heartburn Suggested use Use as directed. Adults and children 6 years and over. Dissolve 1 tablet under tongue 3 times per day.