Everytime I take potassium I get horrible insomnia. I don't want to stop taking it because it makes me feel way more alert and awake and it is the only thing so far that has relieved me of muscle cramps. I've tried potassium chloride and potassium citrate. The more and the closer to bedtime I take it, the worse the insomnia becomes.
Since too much potassium at once is bad for the stomach, especially from supplements, I dissolve 4g of elemental potassium in 1,5l of water and drink it over the course of the day. I've tried getting the whole RDA of 4,7g with food only, but most of the foods high in potassium don't fit well with the diet I thrive best on.
The only thing I have found so far is that if having copper toxicity, potassium intake causes unbound stored copper to be released in the body, which can cause insomnia. Molybdenum is supposed to help with that, but didn't do much for me.
Also, the same happens to me with K2 supplements. Both with the MK-4 and MK-7 form from multiple vendors. From what I've read the MK-4 form of K2 should be out of the system after a few hours, but even just 100 mcg in the early morning still gives insomnia at night.
I've always been prone to insomnia and my 23andMe data suggests that I might be unbalanced towards glutamate, but usually I can cope with that by rotating between GABAergic herbs. Unfortunately those don't help at all with the insomnia from potassium or K2.
Any ideas are appreciated!
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