Turmeric Compound May Protect Blood Vessels From Diabetes-Related Damage: Study

A compound found naturally in turmeric may help protect blood vessels from diabetes-related damage, according to new research in rats. The findings, presented at the 2026 American Physiology Summit, suggest curcumin could have potential as a future approach to reducing cardiovascular complications linked to diabetes.

Curcumin is the substance responsible for turmeric’s bright yellow color and has been widely studied for its anti-inflammatory and antioxidant properties. Researchers from the Florida Institute of Technology investigated whether it could protect blood vessels affected by Type 1 diabetes, a condition that can increase the risk of heart disease when high blood sugar damages the vascular system.

The researchers used rats with Type 1 diabetes and compared animals treated with curcumin with diabetic rats that did not receive the compound. After one month, the curcumin-treated rats showed improvements in several measures of vascular health, with results approaching those seen in non-diabetic animals.

The treatment appeared to reduce inflammation and restore calcium signaling in blood vessels. It also helped normalize levels of heat shock protein 70, a protein involved in protecting cells from stress and whose regulation can become disrupted by diabetes.

Together, these changes may help preserve the structure, elasticity and normal function of blood vessels, potentially reducing some of the cardiovascular damage associated with diabetes.

However, the findings are preliminary. The research was conducted in rats, so it is not yet known whether curcumin would provide the same vascular benefits in people with Type 1 diabetes.

Researchers say clinical studies are needed to determine whether the compound is effective in humans, establish appropriate doses and assess possible interactions with medications.

The findings also do not mean people with diabetes should simply consume more turmeric or start curcumin supplements. Diabetes treatment should continue to focus on proven strategies, including appropriate glucose management and cardiovascular risk reduction.

REFERENCE: American Physiological Society. "Turmeric compound may protect blood vessels from diabetes damage." ScienceDaily. ScienceDaily, 26 August 2026.