Association between lutein intake and lung function in adults: the Rotterdam Study

Area of Science:

• Nutrition Science
• Respiratory Medicine
• Epidemiology

Background:

• Lutein, an antioxidant carotenoid, has potential implications for respiratory health.
• Existing evidence on lutein's effect on lung function is inconsistent.
• Understanding dietary factors influencing lung health is crucial for public health.

Purpose of the Study:

• To investigate the association between lutein intake and lung function parameters in adults.
• To examine lung function measures including forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC), and FEV1/FVC ratio.
• To explore potential modifying effects of smoking status on this association.

Main Methods:

• Cross-sectional analysis of 4402 participants aged 45-79 from the Rotterdam Study.
• Lutein intake assessed via a validated Food Frequency Questionnaire (FFQ).
• Lung function measured using spirometry, with adjustments for numerous covariates including other carotenoids.

Main Results:

• No significant independent association was observed between lutein intake and FEV1, FVC, or FEV1/FVC% in the general adult population.
• A significant inverse association was found between lutein intake and FEV1/FVC% specifically in current smokers.
• This inverse association in smokers persisted after adjusting for other carotenoids and lifestyle factors.

Conclusions:

• The study does not support an independent role for lutein intake in overall lung function in adults.
• High lutein intake may be inversely associated with lung function in specific risk groups, notably current smokers.
• Further research is warranted to explore this potential inverse relationship in vulnerable populations like smokers.