At the Soylent homepage, they show Soylent's main ingredients for macro nurients with pictures. Soy protein, canola oil, Isomaltulose. And I am worried about using Isomaltulose as a main carb.
Unlike the usual main carb we would eat when not on soylent, Isomaltulose is half glucose and half fructose.
While replacing table sugar(sucrose) with Isomaltulose is not only fine but even healthy, replacing main carb (probably starch, which is what we would usually consume as a main carb source) to Isomaltulose means you consume your carbohydrate half fructose.
Whereas glucose is a final product ready for your cells to use, only liver can break down fructose. Thus every fructose you consume goes straight to your liver. In your liver, excessive fructose easily turns into lipid for storage which makes you fat and can cause nonalcoholic fatty liver disease. This is just a fraction of what excessive fructose can do. You can just google the word fructose and find half of the results are about how fructose can be bad for your health. The following is an excerpt from what I found.
"Virtually every cell in the body can use glucose for energy. In contrast, only liver cells break down fructose. What happens to fructose inside liver cells is complicated. One of the end products is triglyceride, a form of fat. Uric acid and free radicals are also formed.
None of this is good. Triglycerides can build up in liver cells and damage liver function. Triglycerides released into the bloodstream can contribute to the growth of fat-filled plaque inside artery walls. Free radicals (also called reactive oxygen species) can damage cell structures, enzymes, and even genes. Uric acid can turn off production of nitric oxide, a substance that helps protect artery walls from damage. Another effect of high fructose intake is insulin resistance, a precursor to diabetes."
According to this writing, the writer says today's 55 gram of average fructose intake of americans is worrisome. And since you consume 185 grams of total carbs a day on a full Soylent diet, making roughly half of that fructose is very far from healthy.
Isomaltulose is excellent when using them as sugar replacement since it is really low on GI index, but using them as main carb for our body and taking half of your carbohydrate as fructose is a huge mistake.
---------------------------> forget that, I got it wrong. I naturally assumed maltodextrin consists only small part of Soylent's carbohydrate. Because isomaltulose is one of the four "Carefully selected ingredients" posted on product introduction page with big pictures representing three macro nutrients. But it turns out there is more maltodextrin than isomaltulose. I guess it would be more appropriate to put maltodextrin in that "Carefully selected ingredients" instead of isomaltulose.