An increase in LDL-Chol concentration is a risk factor for arteriosclerosis. Arteriosclerosis is closely linked to increases in the incidence of coronary artery disease, stroke, and arteriosclerosis obliterans. A recent study indicates that a high LDL-Chol concentration increases the risk of arteriosclerosis, and a high T-Chol concentration increases the risk of coronary artery disease.
The consumption of vegetable and fruit improves lipid composition in blood. Guimares reported that intake of eggplant (Solanum melongena) infusion significantly reduced the blood concentrations of T-Chol, LDL-Chol, and apolipoprotein B in hypercholesterolemia subjects. Futhermore, in a cohort study of 4466 subjects, Djoussé reported that consumption of fruits and vegetables is inversely related to LDL-Chol.
Moreover, previous studies show an association between fruit and vegetable consumption and coronary artery disease, ischemic heart disease, and cerebrovascular disease. Increasing the consumption of fruit and vegetables reduces the risk of coronary artery disease, stroke, and hypertension. Compared with people who consume vegetables and fruits once or less a day, those who consume vegetables and fruits thrice or more a day have lower stroke incidence, stroke mortality, ischemic heart disease mortality, and cardiovascular disease mortality.
High consumption of vegetables and fruits may have effects on blood lipid metabolism and reduce the risk of diseases stemming from arteriosclerosis.
In Japan, “Healthy Japan 21” was developed as a prophylaxis of life-style related diseases by Health, Labour and the Welfare Ministry in 2000. Healthy Japan 21 promotes a vegetable intake of more than 350 g/day, green and yellow vegetable intake of more than 120 g/day, and fruit intake of 200 g/day. However, these goals may still be unattainable in all life stages.
To improve the current situation, we need to take some drastic measures. With such an aim, we produced fresh of fruit and B. rapa juice mixture as a means of providing easy intake of vegetable and fruit.
There are reports that daily intake of commercial vegetable juice increases dietary vegetable intake[7, 8]. However, reports of intervention studies using fresh fruit and vegetable juice are few[9–11].
We conducted an intervention study to investigate whether daily intake of a juice mixture from fresh fruit and B. rapa would affect anthropometric data, blood parameters, and dietary intake.