SPI is a protein in soybeans isolated from soybeans. It is isolated from all other components in soybeans. When you take soy and remove all the sugar, fiber and other natural vitamins and minerals in it, leaving only protein, what is left is protein.
Made through a process called pickling, soybeans are soaked in acid or alcohol to remove sugar and dietary fiber. Then, the rest is dehydrated and finally made into a dry powder that looks like any "ole protein powder".
The end result is an incredibly protein-rich product that contains no cholesterol and almost no carbohydrates or fats. He said that because of this, it is usually used in soy-based infant formula, protein bars, flour, cereals, and meat and dairy substitutes to increase protein content without increasing carbohydrates or calories. count.
The advantages and disadvantages of soy protein isolate
There is no doubt that SPI is an ultra-high protein substance. Richards said that this is why vegetarians or vegans and people who are allergic to milk may use products containing SPI.
But unfortunately, when it comes to SPI, it is not simple: it is high in protein so it is healthy. This is because the process by which soybeans produce high-protein products is controversial.
The extraction process usually leaves residues of chemicals and metals (such as hexane or aluminum). Therefore, if you consume SPI, you may at least eat some of these "leftovers." Although he said that the amount of metal you are exposed to from SPI is unlikely to be toxic, it is generally believed that the best practice is to limit the amount of metal in your diet if possible, because high levels of metals can be toxic. Gasoline fumes, quick-drying glue, spray glue, contact with cement, art and craft paints, and detergents all expose us to these less salty chemicals every day.
Some experts turn a blind eye to SPI for another reason: it contains phytate, also known as an anti-nutrient, which reduces the body's ability to absorb iron and zinc. It is important to note that the extraction process removes zinc and iron powders that are usually present in soy products. Is this a double whammy? certainly. But as long as you eat beans or red meat that contain zinc and iron, you don't have to worry about micronutrient deficiencies caused by SPI.
Another thing that adds to SPI controversy is that they are genetically modified foods. This is not surprising: at least 90% of soybeans grown in the United States are genetically modified. So of course most SPIs too!
Why is this a problem? Some people say no, Valdez said, "There is currently no scientific evidence that non-GMO foods are healthier than genetically modified foods." But some people claim that genetically modified foods have an inflammatory effect on the body and can exacerbate symptoms related to inflammatory diseases, such as arthritis. , Asthma and Crohn’s disease.
Should I avoid using soy protein isolate?
Ultimately, whether you blacklist SPI from your diet depends on your personal needs, body, and goals.
If you suffer from inflammation or otherwise choose to stay away from GMOs, you may want to avoid SPI. The same is true if you have a sensitive stomach. People with moody digestive systems may experience mild stomach upset due to this product.
But if you are a vegetarian, both experts agree that continuing to eat SPI may be fine. Soy protein is indeed the best vegetarian alternative to whey and casein products.
You can also start eating more high-protein, vegetarian-friendly protein sources such as pea protein, brown rice protein, and hemp protein. Or re-prioritize nutrient-rich overall (such as *non-factory engineering) foods, such as the 35 high-protein vegan foods in this list.