365 by Whole Foods Market, Sustained Release Potassium 99mg, Vegan, 250 Tablets

Customers find this potassium supplement to be of good quality and the most inexpensive option available. They appreciate its effectiveness, with one customer noting it helps with side effects of the keto diet, and another mentioning it helps replenish potassium levels. The supplement is easy to swallow, and customers report it helps with muscle cramping.