Usually five to ten minutes after drinking Soylent, I have mild allergic symptoms - redness in the ears, some nasal congestion - the typical symptoms I get when I am responding to other foods that I’m sensitive to (like certain raw vegetables).
I know for a fact that I have a mild to moderate soy allergy. One of the ingredients in Soylent is soy lecithin and the packaging label says that Soylent contains “soy”, which I assume refers to the soy lecithin. Yet everything I’ve read about soy lecithin seems to indicate that the protein within soy that causes the allergy is largely removed when manufacturing soy lecithin.
The other thing I’ve noticed drinking Soylent is I will suddenly find myself feeling cold, like I need to put on a sweater. Has anyone else experienced something similar? I’m not usually a cold person and other refrigerated drinks don’t cause the same response. Think of a time where you’ve just finished a heavy meal at a restaurant, and you head outside and find you are colder compared to when you first entered the restaurant. That’s what it feels like.
I think the culprit could be the high “carb” content in Soylent. The first three ingredients in Soylent are maltodextrin (corn starch), rice protein and oat flour. My theory is that blood rushes from other parts of my body to my digestive system in order to break down these carbohydrates, leaving me feeling “cold” everywhere else.
These two concerns - a mild allergy and a “cold” feeling after consuming Soylent keep me from making it a more substantial part of my diet. While I love the time-saving aspect of the product, I can’t get myself to consume more than one or two glasses a day.