Gut supplements are not one category with one dose rule. Fibers are compared in grams and by tolerance. Probiotics need the full genus, species, strain code, and a count that survives to the stated point. Postbiotics and heat-killed products need the exact preparation used in the study. Butyrate and collagen have different label math again.
Gut
Fiber grams, strain codes, viable counts, and preparation methods are the label details that matter here.