While I was double checking stuff, I came upon the FDA's "Questions and Answers on Dietary Fiber" [1] page where detail what they define as a fiber and what the

While I was double checking stuff, I came upon the FDA's "Questions and Answers on Dietary Fiber" [1] page where detail what they define as a fiber and what they allow to be called a fiber on food labels and cellulose is there. However, I suspect most food companies don't list it as such or use it is for the very reason you mentioned: it sounds like a paper product more than a component of food. It's true not every fiber will act the same, but most all insoluble fibers would be expected to have very similar, if not superior effects for not just weight loss but overall (and at a much cheaper price, I suspect - if 'acetyl cellulose' is even something one can purchase on the open market). But each fiber a person was thinking of consuming would need a bit of research, and even personal trial, to determine which is best for them. I add extra fiber to a breakfast smoothie I have daily in the form of 1 to ½ cups of ground up flax or hemp seeds and occasionally 1 tsp of oat fiber (about ~5g of fiber from ground oat kernels). I use it primarily just to stay regular, but the seeds have an additional benefit of essential fatty acids, and I'm sure it's all beneficial for my gut biome and so forth. A diabetic person who is measuring their glucose levels and have need to keep them stable would want to do more research in regards to that effect. Regardless, I would argue, say, 5-10g per serving of insoluble fiber (possibly a lower amount per meal) should be expected to compete quite well with acetyl cellulose stuff mentioned in this study. [1] https://www.fda.gov/food/nutrition-food-labeling-and-critical-foods/questions-and-answers-dietary-fiber https://www.fda.gov/food/nutrition-food-labeling-and-critica...