At Isagenix we understand the importance of formulating a plant-based shake with complete, quality protein sources. The two primary sources of protein we use in the shake serve important and complementary roles.

For example, the brown rice protein is high in the sulfur-containing amino acids cysteine and methionine, but low in lysine (1). Our pea protein is low in cysteine and methionine, but high in lysine (2). While as sole sources of plant-based protein, each are incomplete, combining these two offers a superior amino acid profile that is on par with dairy or egg protein.

The rice and pea blend is also suitable for those seeking plant-based nutrition and need a protein option without the potential for allergies or intestinal issues. The product does not contain lactose or other hard-to-digest sugars and carbohydrates found in dairy or other plant-based proteins.

Plant-Based Protein Extraction

In addition, Isagenix avoids use of potentially unhealthy chemicals such as hexane during the extraction process of the protein from raw ingredients.

The brown rice protein used in IsaLean® Shake Dairy-Free is produced using low-heat methods that meet organic standards and to ensure integrity of the final product.

The rice protein is extracted from multiple layers of the whole grain, not the more typical rice protein process that uses hexane to chemically extract the protein from only the bran layer. The chemical-free extraction process using enzymes produces a hexane-free protein.

Our pea protein is extracted through physical separation. The peas go through a process of screening, soaking, crushing, separating, and drying. Along the way, the product passes through several phases of sterilization and analytic testing to bring you the safest and most natural product.

Similar to the process of producing our brown rice protein, the process for pea protein doesn’t use a chemical extraction process or hexane. The low-heat process ensures the pea protein is not altered, preventing any denaturation of the product.

Hexane-Free Extraction

An important takeaway is that both of these proteins are produced using hexane-free extraction.

Hexane is a chemical that is used to process raw foods like grains and legumes. In hexane-based extraction, a raw food ingredient like peas is crushed and mixed with hexane to separate the oil, starch, and protein component, then afterward removed (3, 4).

While hexane has not been established as a carcinogen to humans or animals, the use of the chemical is a matter of controversy due to its possible effects on the quality of the protein, as well as lax regulation that might increase potential exposure risk in your final product (5, 6).

As far as we’re concerned at Isagenix, plant-based protein extracted with hexane does not meet our no-compromise quality policy.

When you enjoy your favorite flavor of IsaLean Shake Dairy-Free, you can rest assured that no hexane or other chemical solvents have been used in the processing of your plant-based proteins. The same goes for all the plant-based proteins in IsaLean Bars Dairy-Free.


  1. Kalman, D.S. Amino Acid Composition of an Organic Brown Rice Protein Concentrate and Isolate Compared to Soy and Whey Concentrates and Isolates. Foods 2014 Jun;3(3):394-402.
  2. Tömösközi S, Lásztity R, Haraszi R & Baticz O. Isolation and study of the functional properties of pea proteins. Nahrung. 2001 Oct; 45(6):399-401.
  3. Wang W, Tai F & Chen S. Optimizing protein extraction from plant tissues for enhanced proteomics analysis. J Sep Sci. 2008 Jun; 31(11):2032-9.
  4. Hanmoungjai P, Pyle DL & Niranjan K. J Amer Oil Chem Soc. 2001 Apr; 78(8): 817-21.
  5. Hexane. EPA.
  6. Guidance for industry: chemistry considerations. FDA.