Studies related to Plasma Vitamin C and Grape juice

Changes In Antioxidant Status, Blood Pressure, And Lymphocyte DNA Damage From Grape Juice Supplementation

Effect Increase
Values (umol/L). Mean + SEM. Placebo: before 59.07 ± 5.70, after 68.16 ± 6.70. Grape: before 63.61 ± 5.69, after 68.72 ± 5.70.
Trial Design Randomized trial
Trial Length 1-6 months
Number of Subjects 40
Sex Both Genders
Notes for this study:
In a randomized, double-blind, placebo-controlled trial, 40 healthy but borderline hypertensive participants were allocated to take 5.5 ml/kg of grape juice or a calorie-matched non-fruit juice daily for 8 weeks while on a diet low in fruits and vegetables.

Systolic and diastolic blood pressure were reduced significantly more in the grape juice group than the placebo group. There was no statistically significant difference in lipid profile, antioxidant potential, vitamin C, or catalase, while there a small reduction in DNA damage.
Funding issues for this study:
Funding not disclosed. Welch Foods Inc provided juice.