# Highland Barley Tartary Buckwheat Coarse Grain Biscuits Ameliorated High-Fat Diet-Induced Hyperlipidaemia in Mice Through Gut Microbiota Modulation and Enhanced Short-Chain Fatty Acid Secretion Mice

## TL;DR

A new biscuit made from highland barley and buckwheat helps reduce high cholesterol and fat in mice by improving gut bacteria and fatty acid levels.

## Contribution

A novel multi-grain biscuit formulation is shown to ameliorate hyperlipidemia through gut microbiota modulation and short-chain fatty acid enhancement.

## Key findings

- The biscuits reduced body weight and fasting blood sugar in hyperlipidemic mice.
- Blood lipid levels like cholesterol and triglycerides were significantly lowered.
- Gut microbiota shifted toward beneficial bacteria, and short-chain fatty acids increased.

## Abstract

Dietary modification plays a crucial role in managing and preventing hyperlipidemia. This study examined the combination of highland barley, tartary buckwheat, mung beans, Ormosia hosiei, black rice, and corn germ oil in multi-grain biscuit form. This formulation leverages the synergistic interactions among bioactive compounds, which exert preventive and therapeutic effects against lipid disorders. C57BL/6N mice were fed a high-fat diet for 12 weeks to establish a hyperlipidemia model, followed by feeding with highland barley tartary buckwheat coarse-grain biscuits for 4 weeks. The experimental outcomes revealed that the highland barley tartary buckwheat coarse-grain biscuits effectively controlled body weight and reduced fasting blood sugar levels: body weight was restored to approximately 29 g, and the fasting blood sugar level returned to the normal range of 6 mmol/L. We also observed improved organ indices and regulated blood lipids in hyperlipidemic mice. The total cholesterol of high-fat mice was reduced to 5 mmol/L and the triglyceride level to 1 mmol/L. A significant reduction in inflammatory markers and histopathological improvement in hepatic and adipose tissues were also observed. The intervention enhanced leptin and adiponectin secretion while elevating concentrations of acetic, propionic, butyric, valeric, and caproic acids. Microbiome analysis demonstrated favorable shifts in bacterial populations, characterized by increased Bacteroidetes and Verrucomicrobia abundance and a decreased Firmicutes-to-Proteobacteria ratio, promoting beneficial genera while suppressing potentially pathogenic taxa. These findings suggest that the developed highland barley tartary buckwheat coarse-grain biscuits are a promising dietary intervention for hyperlipidemia management. The effects were potentially mediated through gut microbiota modulation and enhanced short-chain fatty acid production. This research provides novel insights into functional food development for hyperlipidemia.