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High fruit intake delays lung function decline in past smokers

31 Dec 2017
Vitamin and mineral health supplements on the rise in Singapore: Too much of a good thing?

High intake of fruits and tomatoes may delay the decline in lung function in adults, particularly in ex-smokers, a recent study has found.

Food frequency questionnaires (FFQs) were used to assess the dietary intake of 680 adults (mean age at baseline 43.8±6.6 years), among whom 16 percent were current smokers while 40 percent had smoked in the past.

Forced vital capacity (FVC) decreased by a mean of 389 mL over the 10-year study period. High consumption of all fruits significantly slowed the yearly decline by 3.48 mL (95 percent CI, 0.04–6.92; p=0.048). High consumption of apples (3.96 mL/year; 0.76–7.15; p=0.01), bananas (3.97 mL/year; 0.51–7.43; p=0.03), and tomatoes (4.74 mL/year; 1.35–8.13; p=0.006) also significantly decelerated the decline in FVC.

In comparison, forced expiratory volume in 1 second (FEV1) declined by 445 mL over the 10-year study period. Only consumption of total fruit significantly slowed down the yearly decline in FEV1 (2.99 mL/year; 0.37–5.61; p=0.025).

The researchers then investigated the role of smoking and found that dietary intake was significantly related to FVC and FEV1 only in ex-smokers. Total fruit intake, for example, significantly decelerated FEV1 (6.41 mL/year; 2.29–10.5; p=0.002) and FVC (8.13 mL/year; 2.22–14.01; p=0.007) decline only in ex-smokers.

Total intake of apples (FEV1: 4.79 mL/year; 0.87–8.72; p=0.017; FVC: 6.75 mL/year; 1.14–12.34; p=0.018) and tomatoes (FEV1: 5.51 mL/year; 0.87–9.44; p=0.019; FVC: 9.09 mL/year; 3.04–15.14; p=0.003) also slowed down the yearly decline in lung function exclusively in ex-smokers. This trend was absent in current and never-smokers.

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Most Read Articles
4 days ago
The types of bariatric surgery differentially affect the risk of developing acute pancreatitis postoperatively, such that the risk is greater in patients who undergo vertical sleeve gastrectomy vs Roux-en-Y gastric bypass surgery, according to a study. Risk factors include younger age and presence of gallstones.
Yesterday
Concomitant use of psyllium fibres, taken before meals, appears to enhance the cholesterol-lowering effects of statins, according to a recent meta-analysis.
5 days ago
Smoking appears to increase the risk of abdominal aortic aneurysm, particularly among current smokers, reports a recent meta-analysis. The risk appears to taper with a lower number of cigarette sticks smoked per day.
6 days ago
Para-aortic irradiation appears to increase the risk of diabetes among testicular cancer (TC) survivors compared to surgery only, suggests a recent study.