Probiotic culture activity, fatty acids composition and lipid health quality indices of bio-Greek yogurt made from cow, buffalo, goat, sheep or camel milk using transglutaminase
This study demonstrates that Greek yogurt produced from camel milk, when fortified with milk protein concentrate, ABT-5 probiotic culture, and transglutaminase, exhibits superior fatty acid composition and lipid health indices compared to yogurt made from cow, buffalo, goat, or sheep milk, making it the most beneficial option for cardiovascular health despite having the slowest starter activity.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
For decades, scientists have understood that the fats we eat play a critical role in the health of our hearts and blood vessels. Not all fats are created equal; some types help lower harmful cholesterol and keep arteries clear, while others can encourage the buildup of plaque that leads to disease. This distinction is particularly important in dairy products like yogurt, which are consumed globally for their nutritional benefits. The specific mix of fatty acids in milk depends on the animal that produced it, its diet, and how the milk is processed. By examining these microscopic building blocks, researchers can determine which dairy sources offer the best protection against cardiovascular issues, turning a simple breakfast food into a potential tool for better health.
A team of researchers set out to compare the lipid profiles of Greek yogurt made from five different types of milk: cow, buffalo, goat, sheep, and camel. To ensure a consistent texture and thickness across all samples, they fortified each milk with a protein concentrate and added a specific enzyme known as transglutaminase, which helps bind proteins together. They also introduced a probiotic starter culture containing beneficial bacteria to ferment the milk into yogurt. The goal was to see how the natural differences in the milk from these five animals would translate into the final product's fatty acid composition and overall health value. While the process was the same for every batch, the biological origins of the milk created distinct outcomes in the chemical makeup of the yogurt.
The fermentation process itself behaved differently depending on the milk source. The bacteria worked fastest in buffalo milk, reaching the desired acidity level in just four hours. Sheep milk followed closely, while cow milk took five hours. The process was slowest in goat and camel milk, with the camel milk requiring five and a half hours to ferment. Despite this slower start, the yogurt made from camel milk emerged as the clear winner in terms of nutritional quality. It contained the lowest amount of saturated fats, which are often linked to higher cholesterol levels, and the highest concentration of unsaturated fats, which are considered beneficial for heart health.
When the researchers analyzed the specific types of fats, the camel milk yogurt stood out for having the most favorable balance. It was rich in monounsaturated and polyunsaturated fatty acids, the kinds that support cardiovascular function, while containing the least amount of saturated fatty acids compared to the other four yogurts. In contrast, the yogurt made from sheep milk had the highest levels of saturated fats, followed closely by buffalo milk. The camel milk yogurt also showed the highest ratio of healthy unsaturated fats to saturated fats, a key indicator of a heart-friendly diet. Furthermore, it possessed the highest levels of desirable fatty acids and the most efficient natural enzymes for converting fats into healthier forms.
The study also calculated several health indices that predict how a food might affect the risk of heart disease and blood clotting. The camel milk yogurt scored the best on all these measures. It had the lowest scores for indices that indicate a risk of clogged arteries and blood clots, and the highest scores for indices that suggest a protective effect against high cholesterol. This means that, chemically speaking, the fat in camel milk yogurt is the least likely to contribute to cardiovascular disease and the most likely to support a healthy lipid profile. The yogurt made from goat and cow milk ranked second in overall quality, while the buffalo and sheep milk yogurts followed, showing less favorable fat profiles.
Ultimately, the research suggests that while all the yogurts tested are nutritious, the one made from camel milk offers a superior lipid profile for human health. Even though the bacteria took longer to work in the camel milk, the final product contained a composition of fats that aligns best with modern dietary recommendations for preventing heart disease. The study confirms that the type of animal milk used is a decisive factor in the health benefits of the resulting yogurt, with camel milk providing a unique advantage in delivering a fat profile that is gentle on the heart.
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