Nutrition

Best Whey Protein | The Difference Between Impact Whey & Impact Whey Isolate?

The Best Protein Powder To Choose

Whey protein contains protein, fat, carbs, vitamins and minerals. Due to its strong amino acid content and the ability to be absorbed by the body, it is ideal for building muscle. It has been shown to promote muscle protein synthesis, support fat burning, improve insulin sensitivity and suppress appetite. It has also been shown to increase the production of glutathione (antioxidant).

Protein powders are available in the form of whey concentrate or whey isolate. Both of these contain protein, however, isolate, which is made of whey concentrate, undergoes further processing to yield a product with a higher protein concentration.

What Is Whey Concentrate?

Whey protein is created when liquid portions of milk are pushed through a refined filter. The material that is then left behind and left to dry forms whey protein concentrate. This form of whey varies on the amount of fat and carbohydrates in the form of lactose.

The variation of protein can range between 30-80% and include numerous protein subfractions. According to evidence, these peptides need to remain in their natural, undenatured form to exert these properties.

What Is Whey Isolate?

 While whey concentrate has the protein content of approximately 80%, the content within whey isolate is greater at 90%. This is due to cross-flow microfiltration, which causes the protein to separate from fat and lactose. Whey isolate is a common choice for those that are on low-fat diets as it is lower in fat compared to whey concentrate.

Whey isolate is also much lower in lactose, which makes it ideal for those with an intolerance. As whey concentrate is further processed and purified into whey protein isolate, the structure becomes degraded and loses some of its biological activity. However, the amino acid structure and sequence doesn’t change when the protein becomes denatured and will not affect the muscle building qualities. All large proteins are broken down during digestion into amino acids therefore whether this happens in the gut or in a manufacturing process it is irrelevant.

The choice of whey that you go for should depend on your goals, budget and allergies. As whey concentrate has a significantly higher amount of lactose, if you are lactose intolerant, it is beneficial for you to opt for the isolate. However, as there is much more processing to make isolate this makes it more expensive.

Flavour & Gain Control

Comparison: Impact Whey Protein Impact Whey Isolate
Kcal (per 25g) 103 93
Fat (per 25g) 1.9 0.1
Carbs (per 25g) 1.0 0.6
Protein (per 25g) 21 23
Number Flavours Available 51 22

Our articles should be used for informational and educational purposes only and are not intended to be taken as medical advice. If you’re concerned, consult a health professional before taking dietary supplements or introducing any major changes to your diet.

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Jennifer Blow

Jennifer Blow

Editor & Qualified Nutritionist

Jennifer Blow is our UKVRN Registered Associate Nutritionist – the UK’s register of competent and qualified nutrition professionals. She has a Bachelor’s of Science in Nutritional Science and a Master’s of Science by Research in Nutrition, and now specialises in the use of sports supplements for health and fitness, underpinned by evidence-based research.

Jennifer has been quoted or mentioned as a nutritionist in major online publications including Vogue, Elle, and Grazia, for her expertise in nutritional science for exercise and healthy living.

Her experience spans from working with the NHS on dietary intervention trials, to specific scientific research into omega-3 fatty acid supplementation and also the effect of fast foods on health, which she has presented at the annual Nutrition Society Conference. Jennifer is involved in many continuing professional development events to ensure her practise remains at the highest level. Find out more about Jennifer’s experience here.

In her spare time, Jennifer loves hill walking and cycling, and in her posts you’ll see that she loves proving healthy eating doesn’t mean a lifetime of hunger.


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