The amount of potassium (K) appears to be too small to be of value. When served in tablets the FDA has restricted the amount of K to a miniscule amount less than 100 mg. I believe they are afraid that a dissolving pill will cause irritation to the stomach lining due to the localized concentration. Or something like that - I once found the FDA rationale on line but failed to record the link.
For potassium I think you'd be better off using potassium chloride (KCl) powder (http://www.amazon.com/Foods-Potassium-Chloride-Powder-Ounces/dp/B00028M02Q/ref=sr_1_3?ie=UTF8&qid=1403239348&sr=8-3&keywords=potassium+supplement+powder) It can be mixed into some apple or orange juice, among other liquids. You can then get a lot more K. The FDA doesn't seem to have any rules restricting amounts when used in powder form. I've put as much as 0.5 tsp of into a glass of orange juice. Though it can have a laxative effect in large amounts. KCl is a salt much like table salt (Sodium Chloride; NaCl) and tastes like one.