Introduction
This randomised, double-blind, placebo-controlled trial explored whether daily supplementation with the three key macular carotenoids, lutein, zeaxanthin, and meso-zeaxanthin could reduce systemic inflammation and oxidative stress, both of which are critical drivers of cardiovascular disease.
Why was the research undertaken?
Long-term inflammation and damage to cholesterol in the blood are key causes of heart disease. Although certain nutrients called macular carotenoids are known to protect the eyes by reducing inflammation and damage, it wasn’t clear if they could help protect the heart in the same way. This study was designed to find out.
How was the study conducted?
Participants received either:
A daily active capsule containing 10 mg lutein, 10 mg meso-zeaxanthin, and 2 mg zeaxanthin
Or a matching placebo
Over six months, researchers measured serum carotenoid concentrations, pro-inflammatory cytokines (IL‑1β, IL‑6, TNF‑α), and oxidized LDL (OxLDL) at baseline and study end.
What were the results?
Compared with placebo, the supplemented group showed:
Significant rises in serum carotenoid levels
A statistically significant decrease in IL‑1β (p < 0.001) and TNF‑α (p = 0.003)
A significant reduction in OxLDL concentrations (p = 0.009) .
What is the societal benefit?
This study is the first to show that taking supplements with these carotenoids can also help reduce inflammation and damage linked to heart disease. This means these supplements might not only support eye and brain health but could also play a role in keeping hearts healthier. These results could lead to new ways of preventing heart problems through diet and supplements.
