Are you taking Coral Calcium? If so, pH Papers are the best way to check your body's pH level. Olympian Labs pH Papers have a range of 6.0 to 8.0. Check you pH level when taking Coral Calcium on a daily basis. Your ideal pH level is 7.0.Withdraw and tear off approximately 2 inches of paper and apply to tongue or in urine stream. Remove and promptly compare with specimen colors on dispenser to determine corresponding pH.