Liquid protein supplement
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Development and Benefits of Liquid Protein Supplements
Introduction to Liquid Protein Supplements
Liquid protein supplements have gained popularity due to their ease of consumption and potential health benefits. These supplements are used in various contexts, from improving nutritional status in malnourished patients to enhancing recovery in clinical settings. This article synthesizes recent research on the development, effectiveness, and nutritional quality of liquid protein supplements.
Development of Liquid Protein Supplements Using Sesame Protein Isolate
A novel liquid nutritional supplement has been developed using a protein isolate from sesame seed flour, known as Sesaprot® (SP). This supplement demonstrates superior emulsifying properties compared to commercial soybean isolates. While the lysine content is lower than recommended for children, it is adequate for adults, and other essential amino acids are present in sufficient amounts for all consumers. The experimental formulation's osmolality, pH, and emulsion stability are comparable to commercial beverages, and consumer sensory tests showed a preference for the sesame-based product over soybean-based and commercial brands .
High-Protein Liquid Supplements in Clinical Settings
High-protein liquid dietary supplements have shown promise in improving the nutritional status of malnourished hospitalized patients. A study found that administering high-protein liquid supplements increased handgrip strength, body mass index (BMI), and fat-free mass in patients, indicating improved nutritional status and potential benefits for recovery . Similarly, another study compared the clinical outcomes of standard and high-protein liquid supplements in older adults recovering from hip fracture surgery. The high-protein supplement group showed greater improvements in serum albumin levels and consumed more protein, fiber, calcium, vitamin K, and phosphorus, although no significant differences were observed in functional independence measures .
Nutritional Quality and Elemental Content of Liquid Protein Supplements
The nutritional quality of commercial protein supplements varies significantly. An analysis of six commercial protein supplement powders revealed that calcium caseinate and whey protein concentrate had the highest essential amino acid content and met the quality expectations of the Food and Agricultural Organization (FAO). In contrast, other supplements like egg white and pea protein isolate exhibited lower quality due to poor digestibility or lack of specific essential amino acids . Additionally, an analysis of predigested liquid protein products found that these products contained extremely low levels of essential elements, suggesting that they may not be adequate as a sole source of nutrition .
Benefits of Liquid Protein Supplements for Older Adults
Protein-energy supplementation has been shown to prevent functional decline in frail older adults with low socioeconomic status. A community-based randomized controlled study found that providing a liquid protein-energy supplement improved physical functioning and maintained stability in physical performance measures, such as gait speed and timed up-and-go tests, compared to a control group .
Comparison of Liquid and Solid Protein Forms
A study comparing the postprandial plasma amino acid response following ingestion of liquid versus solid milk protein products found no significant differences in amino acid availability between the two forms. This suggests that the form of protein ingestion (liquid or solid) does not significantly impact the rate of digestion and absorption in healthy adults .
Conclusion
Liquid protein supplements offer a convenient and effective way to improve nutritional status, particularly in clinical and elderly populations. The development of new formulations, such as those using sesame protein isolate, and the demonstrated benefits in various studies highlight the potential of these supplements. However, the nutritional quality and elemental content of commercial products can vary, underscoring the importance of selecting high-quality supplements to meet dietary needs.
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