Which Protein Powder is Right?

  • Nature's Source

Casein + WPC

Whey Protein Concentrate (WPC) and caseinate are high in lactose, which can often cause bloating, flatulence, and gastrointestinal distress in some people.



Food sensitivities to gluten can elevate inflammation in some people and cause a range of health problems including hormonal imbalances, skin conditions, fatigue, mood swings, and headaches.



These ingredients can raise glycemic load, which may contribute to fat storage. Most are processed with GMO corn and they can also cause gastrointestinal distress in some people. They are mostly added to protein powders as fillers to bulk it out or make the protein mix easier.


Artificial Sweeteners

Common artificial sweeteners used are sucralose, Splenda, aspartame, equal, NutraSweet, or saccharin and xylitol. Several negative side effects can come from ingesting these ingredients, including headaches, migraines, gastric distress such as bloating, acid reflux and weight gain.


Skim Milk Powders/Milk Solids

Skim milk powders and milk solids are often used as a cheap bulking agent in low quality protein powders. They are high in lactose sugars, which can cause bloating, gastrointestinal distress, constipation, and loose stools. The protein is poorly absorbed into the body, making it harder for you to reap all of its benefits.


Soy Protein

Most soy proteins come from genetically-modified sources with high pesticide use, and contain phytoestrogens, which may cause hormonal disturbances and suppressed thyroid function in some people.


Vegetable Oils and Fats

These ingredients are often added to many weight loss and protein powders to increase richness and make them taste creamy. However, these fats are often derived from hydrogenated sources that contain trans fats, which are thought to be more harmful than saturated fats. Trans fats raise levels of bad cholesterol and lower levels of good cholesterol.


Thickeners and Gums

Thickeners and gums, including xanthan gum, are manufactured from soy or corn and can cause bloating, constipation and gas.



Fillers are often added to bulk up the protein and save money for the manufacturer. Some fillers include ingredients such as coconut flour or psyllium, which can cause gastric distress such as bloating, constipation and reflux in people who are susceptible to digestive issues.