Fruit and vegetables and cardiovascular risk profile: a diet controlled intervention study

Area of Science:

• Nutrition science
• Cardiovascular health
• Dietary interventions

Background:

• Cardiovascular disease remains a leading cause of mortality worldwide.
• Dietary factors, particularly fruit and vegetable consumption, are crucial for cardiovascular health.
• Understanding the impact of increased fruit and vegetable intake on cardiovascular risk markers is essential.

Purpose of the Study:

• To investigate the effect of a high intake of fruits and vegetables on cardiovascular disease risk markers.
• To compare the effects of high versus low fruit and vegetable consumption in a controlled dietary setting.

Main Methods:

• A randomized, diet-controlled, parallel study involving 48 healthy adults aged 40-60 with low usual fruit and vegetable intake.
• Participants were assigned to a 'high' group (500 g/day fruits and vegetables, 200 ml/day fruit juice) or a 'low' group (100 g/day fruits and vegetables) for 4 weeks.
• Energy and fat intake were controlled for both groups.

Main Results:

• No significant differences were observed in final serum lipid concentrations, blood pressure, or haemostatic factors between the high and low fruit and vegetable consumption groups.
• A non-significant trend showed lower total cholesterol in the high intake group (0.2 mmol/l).
• Fibrinogen and systolic blood pressure showed non-significant increases in the high intake group.

Conclusions:

• A short-term, well-controlled dietary intervention with a significant contrast in fruit and vegetable consumption did not yield significant changes in cardiovascular risk markers.
• The study suggests that short-term, high fruit and vegetable intake may not be sufficient to alter key cardiovascular risk factors.
• Further research with longer durations and different populations may be warranted.