Tart Cherry Juice and Markers of Inflammation, CVD, and Diabetes
Condition: Hyperuricemia; Insulin Resistance; Obesity; CVD
MeSH terms: Insulin Resistance; Inflammation; Hyperuricemia
Study type: Interventional

Summary: 
      In this study, the investigators recruited at-risk individuals (n=26) who were overweight
      (25.0-29.9 kg/m2) and obese (> 30.0 kg/m2) and likely to exhibit one or more conditions
      associated with Metabolic Syndrome (MetS). In this 12-week placebo-controlled 2 x 2 crossover
      dietary intervention, the investigators randomized participants to consume 240 mL (8 ounces)
      daily of either placebo (artificial cherry-flavored, anthocyanin-free beverage) or TCJ for 4
      weeks, followed by a 4-week washout period, then consumption of the alternate beverage for 4
      weeks. Subsequently, the investigators determined the effect of TCJ in at-risk participants
      on markers of uricemia, lipidemia, glycemia, and inflammation.
    

Detailed description: 
      In this study, the investigators recruited at-risk individuals (n=26) who were overweight
      (25.0-29.9 kg/m2) and obese (> 30.0 kg/m2) and likely to exhibit one or more conditions
      associated with MetS. Participants were >18 years of age, not pregnant, not diabetic, with no
      unresolved infections or diseases (diabetes, CVD, IBD, cancer and liver disease), and
      nonsmokers. Histories of medication and dietary supplement use were collected and those
      taking anti-inflammatory or lipid-lowering medications were excluded. After enrollment,
      participants were randomly assigned to consume daily either 240 mL (8 ounces) of TCJ diluted
      (1:6 v/v) from concentrate (Coloma Frozen Foods, Coloma, MI ) or a placebo beverage for 4
      weeks. The placebo was prepared by combining 48.3 g each of dextrose and fructose (Batory
      Foods, Des Plaines, IL), food-grade red and blue dyes (2.0 mL and 0.1 mL, respectively;
      McCormick & Company, Inc., Sparks, MD), lemon powder drink mix (0.8 g; True Citrus,
      Baltimore, MD), powdered black cherry drink mix (4.0 g; Kraft Foods Group, Inc., Northfield,
      IL), and filtered, bottled water (local supermarket) to produce 1 liter of placebo beverage.
      After a 4-week washout period, participants consumed the alternate beverage for 4 weeks in
      this 12-week 2x2 crossover, placebo-controlled dietary intervention. Subsequently, the
      investigators determined the effect of TCJ in at-risk participants on markers of uricemia
      (sUA), lipidemia (HDL, LDL, triglycerides, VLDL, total cholesterol), glycemia (fasting
      insulin and glucose, HOMA, QUICKI, McAuley indirect indices), and inflammation (hsCRP,
      TNF-alpha, and ESR).
    

Intervention name(s): Tart cherry juice; Placebo
Intervention type(s): Dietary Supplement; Other
Intervention description(s): Participants randomized to consume for 4-weeks either placebo beverage or single-strength tart cherry juice at beginning of the study followed by a 4 week washout then switch over to the alternate beverage for 4 weeks to account for timing and order effects.; Participants randomized to consume either placebo beverage or tart cherry juice at beginning of the study followed by a 4 week washout then switch over to the alternate beverage to account for timing and order effects.
Allocation: Randomized
Intervention model: Crossover Assignment
Intervention model description: In this study, the investigators recruited at-risk individuals who were overweight (25.0-29.9 kg/m2) and obese (> 30.0 kg/m2) and likely to exhibit one or more conditions associated with MetS. In this 12-week placebo-controlled 2 x 2 crossover dietary intervention, the investigators randomized participants to consume 240 mL (8 ounces) daily of either placebo (artificial cherry-flavored, anthocyanin-free beverage) or TCJ for 4 weeks, followed by a 4-week washout period, then consumption of the alternate beverage for 4 weeks. Subsequently, the investigators determined the effect of TCJ in at-risk participants on markers of uricemia, lipidemia, glycemia, and inflammation.
Masking: Single (Participant)
Primary purpose: Treatment
Keywords: obese; overweight; tart cherry juice