People with diabetes usually have sleep issues.

people with diabetes usually have sleep issues.
In this randomized controlled trial they gave 300 diabetics:
1) placebo.
2)250mg magnesium gluconate.
3)250mg potassium chloride.
4)magnesium and potassium.
sleep quality, cortisol and melatonin levels were tested.
the results?

cortsiol levels after 2 months:
magnesium group: dropped 50%
potassium group: dropped 25%
magnesium + potassium group: dropped 50%
placebo: dropped 4%.

Melatonin levels:
magnesium group: small rise
potassium group: small rise
magnesium + potassium group: 150% rise
placebo: small drop

Insomnia Severity Index (ISI) scores:
magnesium with and without potassium improved sleep score.