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Maltodextrin is permitted by the US FDA. Several countries restrict, warning-label, or have reviewed it for safety concerns. The US has more lenient additive rules than the EU, UK, Canada, and Japan, which is why this ingredient remains widely used here.
Maltodextrin's very high glycemic index (GI 85–105) means it causes rapid blood glucose spikes, potentially problematic for people with diabetes or insulin resistance. A 2012 study in PLoS ONE (Bhatt et al.) found that maltodextrin suppressed beneficial gut bacteria (like Lactobacillus) and increased Escherichia coli biofilm formation associated with Crohn's disease. A 2022 study in Nutrients noted maltodextrin's potential to disrupt gut microbiome composition at typical dietary intakes. Regulatory agencies have not restricted its use, but nutrition researchers increasingly flag it as a low-quality carbohydrate.
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