Non-Fat Fermented Milk Enhanced the Bioavailability of Fat-Soluble Vitamins in Humans: A Crossover Study

Area of Science:

• Nutritional Science
• Biochemistry
• Human Physiology

Background:

• Fat-soluble vitamin deficiencies are a significant global health concern.
• Carotenoid absorption is known to be enhanced by co-ingestion with non-fat fermented milk and vegetables.
• Fat-soluble vitamins and carotenoids share similar absorption pathways.

Purpose of the Study:

• To investigate whether non-fat fermented milk enhances the absorption of essential fat-soluble vitamins.
• To test the hypothesis that co-ingestion with non-fat fermented milk improves fat-soluble vitamin bioavailability.

Main Methods:

• A two-group, two-phase crossover study involving 20 healthy males.
• Participants consumed a fat-soluble vitamin solution (vitamins A, D, E, K) with either water or non-fat fermented milk.
• Blood samples were analyzed for vitamin concentrations in plasma and triacylglycerol-rich lipoprotein (TRL) fractions over 8 hours.

Main Results:

• Significantly higher plasma concentrations of vitamins A, D, and K were observed when co-ingested with non-fat fermented milk compared to water.
• Enhanced levels of alpha-tocopherol and gamma-tocopherol in the TRL fraction were noted with non-fat fermented milk co-ingestion.
• The incremental area under the curve for several fat-soluble vitamins was significantly greater in the non-fat fermented milk group.

Conclusions:

• Co-ingestion of non-fat fermented milk with fat-soluble vitamins enhances their bioavailability.
• This presents a novel nutritional approach to improve fat-soluble vitamin absorption.
• This strategy holds potential for addressing widespread nutritional deficiencies impacting global health.