Vitamin K1 from leafy greens linked to lower COPD risk in large study

A large international study has found that people who consume more vitamin K1 from leafy green vegetables and broccoli have a 16% lower risk of developing chronic obstructive pulmonary disease (COPD) and better lung function overall. The research, led by Edith Cowan University (ECU) in Australia and published in The American Journal of Clinical Nutrition, followed more than 179,000 adults for ten years Source: lavozar.

The findings

Participants with the highest intake of vitamin K1—found in spinach, kale, broccoli, and other greens—showed significantly better lung function, measured by lung volume and airflow, and were less likely to develop COPD compared to those with low intake Source: infobae. In contrast, vitamin K2 from animal sources (meat, eggs, dairy) showed no such association Source: lavanguardia.

How it may work

The researchers suggest that vitamin K1 helps activate proteins that protect the elastic fibers in lung tissue, which allow the lungs to expand and contract properly Source: lavozar. Dr. Marc Sim of ECU explained: “When these fibers deteriorate, breathing becomes more difficult over time. This nutrient can help preserve lung tissue flexibility” Source: infobae.

What it doesn't mean

• The study does not show that vitamin K1 prevents asthma Source: lavozar.
• Authors emphasize that a healthy diet cannot replace quitting smoking or avoiding air pollution, which remain the primary risk factors for COPD Source: lavanguardia.
• Adding one extra serving of leafy greens per day (about 1.5–2 cups) can boost vitamin K1 intake, but it is only one part of a comprehensive lung health strategy Source: infobae.