I'd look at any long term medication as a factor. PPIs can definitely affect magnesium. https://www.gov.uk/drug-safety-update/proton-pump-inhibitors-in-long-te

I'd look at any long term medication as a factor. PPIs can definitely affect magnesium. https://www.gov.uk/drug-safety-update/proton-pump-inhibitors-in-long-term-use-reports-of-hypomagnesaemia https://www.gov.uk/drug-safety-update/proton-pump-inhibitors... On the other hand if your heartburn causes reflux then the PPI can help sleep. https://www.ncbi.nlm.nih.gov/pubmed/24942514 https://www.ncbi.nlm.nih.gov/pubmed/24942514