Is Magnesium Citrate Safe with Whey Protein?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Separate whey protein and magnesium citrate by at least 1-2 hours to optimize absorption of both. This is particularly relevant for patients on diuretics causing magnesium wasting.
Why this interaction occurs
High protein intake from whey may transiently affect gastrointestinal transit and pH, potentially reducing magnesium absorption efficiency. In patients on loop diuretics or thiazides already at risk for hypomagnesemia, this additive reduction may be clinically significant.
Evidence
Evidence level: limited.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 764,340 reports mentioning Whey Protein. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Whey Protein + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Magnesium Citrate interactions → · All Whey Protein interactions →
Already checked this one — check your whole list
Educational only — not medical advice.
Always confirm with your doctor or pharmacist.