Tarsul Case 300 Gram Bottles (12 per case) -Tarsul 300 Gram Bottle equals approximately 2 months supply at 1 teaspoon per day or 1 months supply at 2 teaspoons per day. Tarsul’s ingredients potassium bitartrate (cream of tartar) and MSM sulphur play an important part in a healthy diet. According to the World Health Organization we need around 3.5 Grams of potassium per day. Additionally, sulphur is needed to power the cellular interactions in our bodies and for good digestive health. 1 teaspoon of Tarsul contains enough of these ingredients to help balance the average daily diet.