Magnesium: quick overview by a practicing doctor - May 2026

Snippits from his ~10 minute read include

(this is) "The version I would give in the office if only I had more time. I make no money from commissions or selling stuff."
Certain people are far more prone to it than the general population, where low magnesium levels still run about 3–10%.
Antacids like omeprazole cause deficiency in roughly 20% of long-term users, and
diuretics used for treating conditions like high blood pressure waste magnesium through the kidney.
Poorly controlled type 2 diabetes (10–30% prevalence),
alcohol use disorder, and chronic diarrhea or malabsorption are classic culprits,
as are certain chemotherapies and
older folks on five or more medications.
..."magnesium is essential for nerve transmission, muscle contraction (including our hearts), bone metabolism, energy production, and the regulation of blood pressure and glucose"
What the evidence actually supports
Migraine prevention
Blood pressure.
Blood sugar control
Why a magnesium blood test might be misleading
" A meta-analysis of 48 trials found that blood levels reach a steady state only after roughly 20 weeks of consistent supplementation, and meaningfully restocking total body stores takes three to five months
"If you want to try it for sleep, anxiety, or cramps, the evidence is weaker than the marketing suggests, "

Diabetes

Hypertension

Magnesium - many studies

Magnesium/Calcium Ratio