Each serving provides 21 g of protein, is high in fibre and delivers 155 kcal, making it a practical option for individuals looking to support their weight management goals while maintaining a balanced nutritional intake. The protein comes from a blend of whey, milk and soy proteins, providing both rapidly and more gradually digested proteins. Diet Fuel Ultralean is naturally gluten-free, suitable for lacto-vegetarian diets, and contains Tolerase L, a lactase enzyme that helps break down lactose and may improve lactose digestion in individuals who have difficulty digesting it. It also contains added chromium, which contributes to normal macronutrient metabolism and the maintenance of normal blood glucose levels. 

How does it work?

Successful weight management isn’t simply about eating fewer calories, it also involves choosing foods that are nutritious, satisfying and sustainable. 

Diet Fuel Ultralean combines protein with carbohydrates, healthy fats, fibre and a wide range of vitamins and minerals to provide balanced nutrition in a convenient format. Unlike a standard whey protein, which is designed primarily to increase protein intake, Diet Fuel Ultralean is intended to provide a more complete nutritional option when preparing a balanced meal isn’t possible.

Protein is a key nutrient to prioritise during weight management. It contributes to feelings of fullness, which may help manage hunger between meals, while also helping to preserve lean muscle mass during weight loss. Preserving muscle is important for maintaining strength, physical function and metabolic health. The combination of whey, milk, and soy proteins in Diet Fuel Ultralean provides both rapidly and more gradually digested proteins, helping deliver amino acids over a longer period while contributing to overall protein intake.

The high fibre content further supports satiety, making meals more satisfying and helping to support a consistent eating pattern. 

 For individuals using GLP-1 medications, whose reduced appetite can make it difficult to consume enough protein and other essential nutrients, a nutritionally balanced shake may be a practical way to help meet all nutritional requirements when eating larger meals feels challenging. 

Who is it best suited for?

Diet Fuel Ultralean may be a good choice for: 

•  Individuals following a structured weight management plan.
•  Busy professionals looking for a convenient, balanced meal option.
• People who regularly skip meals because of a busy schedule.
• Individuals wanting a nutritionally balanced option while travelling or working long hours.
• People using GLP-1 medications who may find it difficult to consume enough protein and other essential nutrients because of a reduced appetite.
• Individuals following a naturally gluten-free or lacto-vegetarian eating pattern.

When would I choose Diet Fuel Ultralean?

Diet Fuel Ultralean is most useful when convenience is just as important as nutrition. Practical ways it can fit into your routine include:

• As a quick breakfast before work on busy mornings.
• As a convenient lunch when meetings or travel make preparing food difficult.
• During long workdays when a balanced meal isn’t easily available.
• While travelling when nutritious meal options are limited.
• On days when appetite is reduced and eating a full meal feels challenging.
• As a practical option for individuals using GLP-1 medications who struggle to meet their daily protein and nutrient requirements.

References

1.       Jager, R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition Position Stand: Protein and Exercise. J Int Soc Sports Nutr. 2017;14:20. DOI: 10.1186/s12970-017-0177-8.

2.       Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med. 2018;52(6):376-384. Doi:10.1136/bjsports-2017-097608.

3.       Phillips SM, Van Loon LJC. Dietary protein for athletes: From requirements to optimum adaptation. J Sports Sci. 2011;29(Suppl 1):S29-S38. Doi:10.1080/02640414.2011.619204.

4.       Leidy HJ, Clifton PM, Astrup A, et al. The role of protein in weight loss and maintenance. Am J Clin Nutr. 2015;101(6 Suppl):1320S-1329S. doi:10.3945/ajcn.114.084038.

5.       Dhillon J, Braig BA, Leidy HJ, et al. The effects of increased protein intake on fullness: A meta-analysis and its limitations. J Acad Nutr Diet. 2016;116(6):968-983. DOI:10.1016/j.jand.2015.09.100.

6.       Deutz NEP, Bauer JM, Barazzoni R, et al. Protein intake and exercise for optimal muscle function with aging: Recommendations from the ESPEN Expert Group. Clin Nutr. 2014;33(6):929-936.

7.       American Diabetes Association Professional Practice Committee. Standards of Care in Diabetes – 2025. Diabetes Care. 2025;48(Suppl 1).

8.       Rubino D, Greenway FL, Khalid U, et al. Effect of continued weekly subcutaneous semaglutide vs placebo on weight loss maintenance in adults with overweight or obesity (STEP 4). JAMA. 2021;325(14):1414-1425.

9.       USN South Africa. BlueLab 100% Whey Protein. Product information and nutritional information.

10.  USN South Africa. Hydrotech Whey. Product information and nutritional information.

11.  USN South Africa. Diet Fuel. Product information and nutritional information.