Ceylon cinnamon (Cinnamomum verum) has been investigated for its potential effects on lipid profiles, including triglyceride levels. Several small clinical trials and meta-analyses have assessed cinnamon supplementation in people with metabolic syndrome, type 2 diabetes, or high cholesterol. Some studies have shown modest reductions in serum triglycerides, while others report no significant effect. Most research has focused on Cassia cinnamon (Cinnamomum cassia), but a few studies have included or specified Ceylon cinnamon.

The proposed mechanism involves bioactive compounds in cinnamon, such as cinnamaldehyde, which may improve insulin sensitivity and influence enzymes involved in lipid metabolism. Meta-analyses (e.g., Allen et al., 2013; Akilen et al., 2012) suggest cinnamon may lower triglycerides by 20-30 mg/dL on average, but these effects are inconsistent, and high-quality studies are limited. Furthermore, the majority of trials are short-term, use varying doses and species of cinnamon, and include small sample sizes.

In summary, there is some scientific evidence suggesting Ceylon cinnamon may help reduce high triglycerides, but the results are mixed and not robust. Larger, well-designed trials are needed to confirm these effects and directly compare Ceylon with Cassia cinnamon. Current evidence supports only a modest benefit, and cinnamon should not replace standard medical therapy for hypertriglyceridemia.