Does magnesium help with insulin resistance?
There is reasonable evidence that magnesium has a beneficial effect on insulin resistance, particularly if your magnesium levels are too low. If you have a condition like insulin resistance, always discuss supplementation with your doctor before starting.
Yes, magnesium can help with insulin resistance, especially if your magnesium levels are too low. The mineral activates an enzyme, tyrosine kinase, which sets the insulin receptor on cells into action. Without enough magnesium in the cell, that receptor functions less well, cells absorb less glucose, and the body loses additional magnesium through the kidneys because insulin no longer regulates uptake properly. This becomes self-reinforcing.
Low magnesium levels are repeatedly found in people with insulin resistance and type 2 diabetes. Whether low magnesium is the cause or the consequence is not certain: both can be at play simultaneously. A meta-analysis of double-blind studies showed a significant reduction in fasting blood sugar after magnesium supplementation in people with diabetes. In people at elevated risk of diabetes, insulin sensitivity also improved and they scored better on a glucose tolerance test. A separate study in forty women with polycystic ovary syndrome found a significant reduction in insulin and insulin resistance after two months of 250 mg magnesium oxide per day. Because that study was small and conducted in a specific group, its findings cannot simply be extrapolated to everyone.
In research, people with diabetes or elevated risk received 250 mg magnesium oxide per day for at least 8 weeks. If you want to use magnesium for blood sugar or insulin resistance, discuss this with your doctor, including the correct dose and form. Pay attention to the label for 'magnesium (elemental)' and the dose in mg per tablet: oxide, chloride and other salts have been studied. The precise salt form matters less in the studies than the elemental amount of magnesium.
Obtaining magnesium through diet also appears to be beneficial for broader metabolic markers such as blood pressure and triglycerides. In a large observational study of more than 21,000 people, those with a higher magnesium intake were less frequently affected by serious heart and kidney conditions and died less often, but it has not been proven that magnesium is the cause.
Based on one meta-analysis of randomised trials (PMID 34836329), one small RCT in PCOS (PMID 37393389), one mechanistic article (PMID 15319146), one narrative review (PMID 33499378), and two observational studies/reviews (PMID 26404370, 32585827, 40073760).
Does strength training help against insulin resistance?
Strength training probably helps against insulin resistance, although the effect is most strongly demonstrated in combination with endurance training and, for additional weight loss, changes in diet.
What is insulin resistance and can I reverse it?
Insulin resistance can be meaningfully improved with exercise and a modest weight loss of 7 to 10 percent. You do not need a perfect lifestyle, though dietary choices and meal timing also help.
How do you measure insulin resistance?
Insulin resistance is measured most accurately with the clamp method. In practice, a calculation based on blood fat and fasting blood sugar is a good approximation.
Does fermented food help with insulin resistance?
Fermented food, especially yoghurt, kefir and probiotic supplements containing Bifidobacterium, lowers blood sugar and insulin resistance in people with diabetes or prediabetes. Early research suggests this effect can be enhanced further by combining probiotics with fibre-rich prebiotic substances.
What does magnesium do for your bone strength?
Getting enough magnesium appears to be good for your bones, but whether supplements truly prevent fractures has not yet been convincingly demonstrated. First make sure your intake through diet is in order; consider supplementation only if you know you are deficient, and discuss this with your doctor if in doubt.
Can you take too much magnesium?
Yes, too much magnesium can be dangerous, although serious toxicity through ordinary supplements is rare in people with healthy kidneys. With kidney problems or the use of intravenous magnesium, medical supervision is genuinely necessary.