NCT00962195

The Effect of Purple Sweet Potato (PSP)-Juice on Liver Enzymes and Blood Pressure

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 40 (actual)
• Sponsor: TNO · Academic / Other
• Sex: All
• Age: 40 Years – 70 Years
• Healthy volunteers: Accepted

Summary

Purple Sweet Potato juice (PSP-juice) is a juice based on purple-fleshed sweet potato concentrate, containing a high level of anthocyanins. Purple-fleshed sweet potatoes have attracted attention to industry and scientists due to multiple physiological functions such as radical-scavenging, ACE-inhibitory and α-glucosidase inhibitory activities in vitro, and also hepato-protective, antihypertensive and antihyperglycemic effects in vivo. Previous studies in Japanese subjects showed potential beneficial effects of PSP beverages on liver function and blood pressure in volunteers with impaired hepatic function and/or hypertension. The main objective of this study is to examine the effect of PSP-juice on liver enzymes and blood pressure. The secondary objective is to examine the effects of PSP-juice juice on insulin resistance.

Detailed description

Study design: The study is designed as a randomized, parallel, placebo-controlled, double-blind study. Study population: 40 healthy adult female and/or male subjects, 40-70 yr old with a BMI 25-35 kg/m2, mildly elevated serum liver enzymes, and high normal blood pressure or mild hypertension. Intervention: Daily oral intake of 3x 125 ml of PSP-juice or control juice for a period of 8 weeks. Main study parameters/endpoints: Liver enzymes (GGT, ALAT, ASAT), blood pressure, glucose, insulin, haematology and serum clinical chemical profile

Conditions

• Health
• Blood Pressure
• Liver Function
• Insulin Resistance

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	purple sweet potato (PSP)-juice	Daily oral intake of 3x 125 ml of PSP-juice or control juice

Timeline

• Start date: 2009-06-01
• Primary completion: 2009-12-01
• Completion: 2009-12-01
• First posted: 2009-08-19
• Last updated: 2010-04-14

Locations

1 site across 1 country: Netherlands