Does chromium affect heart health? What the research does and doesn't show

No case report or trial in this literature describes heart palpitations as something chromium caused. The research that does exist on chromium and heart health is limited to blood markers linked to cardiovascular risk — inflammation and lipids — not to heart disease itself, and none of it was designed to answer a safety question like palpitations.

What the evidence doesn't support

It doesn't support chromium causing heart palpitations — no trial or case report reviewed here reports that effect, and the adverse-event lists from chromium's largest safety reviews don't include it. It also doesn't support chromium as a treatment for heart disease: no trial has tested chromium supplementation against heart attack, stroke, heart failure or any other cardiac event as an outcome. What exists instead is a smaller set of trials measuring markers associated with cardiovascular risk.

What the trials found

A 2021 meta-analysis of randomized controlled trials looked at chromium's effect on inflammatory markers tied to cardiovascular risk. Pooled results showed chromium supplementation significantly reduced high-sensitivity C-reactive protein (weighted mean difference −0.87 mg/dL) and tumor necrosis factor-alpha (weighted mean difference −0.97 pg/mL); the reduction in interleukin-6 wasn't statistically significant. The authors framed this as a finding about inflammation biomarkers, not a demonstrated reduction in cardiac events.

A 2025 meta-analysis of 20 trials in overweight and obese adults reported a small favorable shift in lipid profile alongside chromium's better-established effects on glucose and insulin — but it also found a slight increase in blood pressure in the chromium groups, a mixed picture covered in more detail on chromium and blood pressure.

Separately, the two largest safety reviews of chromium trials — one in overweight and obese adults, one in people with diabetes — documented adverse events in detail: watery stools, vertigo, headaches and hives, with no significant difference in overall adverse-event rates between chromium and placebo. Palpitations, arrhythmia and other cardiac symptoms don't appear on either list.

Questions people ask

Can chromium cause heart palpitations?

No trial or case report in this literature documents it. That's an absence of reported cases, not a study that specifically monitored for palpitations and ruled them out — if you notice new heart symptoms after starting any supplement, stop and see a doctor.

Is chromium good for heart disease?

No trial has tested chromium against heart disease outcomes directly. The data that exists shows chromium supplementation reduced some inflammatory markers linked to cardiovascular risk in pooled trials — a finding about biomarkers, not a demonstrated reduction in heart attacks or strokes.

Does chromium affect cholesterol?

A 2025 meta-analysis in overweight and obese adults found a small favorable shift in lipid measures alongside chromium's effects on glucose and insulin, but the same review reported a slight increase in blood pressure in the same population — see chromium and blood pressure for that detail.

When to talk to a doctor

Heart disease, arrhythmia and related cardiac conditions are managed by a doctor, with monitoring and medication where needed — not with a supplement search. Chromium is not a treatment for heart disease, and nothing in the research above supports using it as a substitute for cardiac care. If you take heart medication or any other prescription drug, or you notice new symptoms like a racing or irregular heartbeat, talk to a doctor.

Related reading: chromium and blood pressure, chromium side effects, and chromium and medications: what to check.