Functional Properties of a High Protein Beverage Stabilized with Oat‐β‐Glucan

• Published in: Journal of food science Vol. 83; no. 5; pp. 1360 - 1365
• Main Authors: Vasquez‐Orejarena, Eva, Simons, Christopher T., Litchfield, John H., Alvarez, Valente B.
• Format: Journal Article
• Language: English
• Published: United States Wiley Subscription Services, Inc 01.05.2018
• Subjects: Adolescent; Adult; Aged; Avena - chemistry; beta-Glucans - analysis; Beverages; Beverages - analysis; Cardiovascular diseases; Chemical Phenomena; Dietary fiber; Dietary Fiber - analysis; Dietary Proteins - analysis; Dietary supplements; Flour; Flour - analysis; Food production; Formulations; functional beverage; Glucan; Gums; Health risks; high protein; Humans; Middle Aged; Nectar; Oats; oat‐β‐glucan; Proteins; Sensory evaluation; surface response methodology; suspension stability; Sweetness; Taste; Viscosity; Viscosity coefficient; Young Adult; β-Glucan; surface response methodology; high protein; functional beverage; suspension stability; oat-β-glucan
• ISSN: 0022-1147; 1750-3841
• DOI: 10.1111/1750-3841.14119

This study evaluated the effect of oat flour and milk protein on the functional properties and sensory acceptability of shelf stable high protein dairy beverages containing at least 0.75 g of oat‐β‐glucan per serving size. Formulations adjusted to levels of 1.50% to 2.30% oat flour and 2.50% to 4.00% milk protein isolate (MPI) were thermal processed in a rotary retort. The finished product exhibited good suspension stability (>80%). The increase of oat and MPI contents lead to nectar‐like beverages (51 to 100 mPas). However, oat flour was the component showing the highest effect on the viscosity coefficient values of the beverages. Sensory evaluation indicated that formulations with less than 1.9% oat flour and 2.5% MPI (thin liquid, <50 mPas) were the most accepted. Mouthfeel (perceived thickness), sweetness and aftertaste had the most influence on overall liking of the beverages. Practical Application Overall, this study comprises the development of a functional food product. Supplementation of beverages with fiber from oats is an innovative approach to stabilize high protein beverages. Ready to drink protein beverage formulations use gums to stabilize the product and provide a desirable mouthfeel. The levels of oat‐β‐glucan used in the beverage increased the thickness and meet the requirement of the FDA approved health claim for reduction of the cardiovascular disease risk (21 CFR 101.81).