Effects of Berries and Berry Fractions on Metabolic Diseases

University of Turku110 enrolled

Overview

The study hypothesis is that the bioactive compounds of sea buckthorn berries (Hippophaë rhamnoides), their fractions, and bilberries (Vaccinium myrtillus). have positive effects on lipid and carbohydrate metabolism and will thus reduce the risk of developing metabolic diseases.

The aim of the project was to investigate whether it is possible to reduce the risk of metabolic diseases with supplementing the diet with sea buckthorn berries (Hippophaë rhamnoides), their bioactive fractions, and bilberries (Vaccinium myrtillus). The study design was a randomized cross-over clinical trial. The participants were slightly and moderately overweight female subjects. In total, 110 female volunteers were recruited, and they followed four different berry diets (bilberry, sea buckthorn, sea buckthorn phenolic extract and sea buckthorn oil) in a randomized order for 33-35 days. Each intervention was followed by a wash-out period of 30-39 days. Blood samples were drawn and physical measurements were performed after each period. Eighty volunteers completed the study. Different markers of lipid and carbohydrate metabolism and inflammation were measured form the blood samples.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

NONE

Enrollment

110

Conditions

Type 2 Diabetes Atherosclerosis

Interventions

BilberriesDIETARY_SUPPLEMENT

Frozen bilberries, 100 g/d

Sea buckthorn berryDIETARY_SUPPLEMENT

Dried sea buckthorn berries, 20 g/d

Sea buckthorn phenolic extractDIETARY_SUPPLEMENT

Ethanol-water extract from sea buckthorn berries, combined with maltodextrin, 14.6 g/d (7.3 g sea buckthorn extract + 7.3 g maltodextrin)

Eligibility

Sex: FEMALEMin age: 30 YearsMax age: 55 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * BMI 26-34 * total cholesterol 4.5-8 mmol/l * LDL chol \>2.5 mmol/l * triglycerides \<4 mmol/l * glucose \<6 mmol/l * insulin \<25 mU/l * blood pressure \<160/99 mm Hg * hemoglobin \>120 g/l * thyroid-stimulating hormone 0.3-4.2 mU/l * ALAT \<60 U/l * creatinine \<115 umol/l Exclusion Criteria: * pregnancy * menopause, * regular smoking * previously diagnosed diabetes (other than gestational) * thyroid, renal, hematological, or hepatic dysfunction * previous myocardial infarction * cardiovascular medication * treatment with regular medication other than allergy medication or joint lubricates * on-going inflammatory disease

Locations (1)

University of Turku, Dept of Biochemistry and Food Chemistry

Turku, Finland