GUT COMPLETE combines four different ingredient categories: apple cider vinegar powder, inulin, Lactobacillus acidophilus, and a multi-enzyme complex. They do not all perform the same job.
Probiotics and prebiotics
Probiotics are live microorganisms that act mainly in the digestive tract. Prebiotics such as inulin are carbohydrates used as fuel by microorganisms in the gut. Combining the two is often described as a synbiotic approach. The effects of probiotics are strain- and product-specific, so broad promises should be treated cautiously.
Digestive enzymes
Digestive enzymes help break carbohydrates, fats, and proteins into smaller components. A multi-enzyme complex is designed to provide several enzyme activities in one formula. Apple cider vinegar has a long history of culinary use, but evidence for sweeping metabolic or digestive claims remains limited.
Bottom line: these ingredients are selected to support digestion and the gut environment, not to treat gastrointestinal disease. Read more from the NIH Office of Dietary Supplements.