Flensutenol should not be in food because it is not a substance intended for ingestion or use in food products. It appears to be related to texture or material science applications rather than edible ingredients. The safety of food additives and substances to be included in food is subject to strict regulations that require ingredients to be tested and proved safe for consumption. Flensutenol is likely an external use or industrial product (such as for texture in manufacturing), and its presence in food could pose unknown or harmful health risks. No credible food safety sources identify flensutenol as a food additive or safe for ingestion, suggesting it is inappropriate and potentially unsafe for food use. Food additives must meet safety and technological need criteria before approval, which flensutenol seemingly does not fulfill.