https://www.amazon.com/NOW-Supplements-Calcium-Magnesium-Supports/dp/B00028LZ9A

Just pick up some potassium.

I take them every day! Full disclosure that I have not taken a blood test to monitor their effectiveness, so I can only say that I use them lol

I also take them with a calcium and magnesium supplement from Amazon because the vitamins don't have 100% of daily calcium or magnesium (This is not the vitamin's fault though; this is very common. We need so much calcium/magnesium that the calcium/magnesium supplements require TWO full pills per serving size just for calcium/magnesium, but the multivitamin is just one pill per serving size for all of the other vitamins and minerals etc)