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Heme-containing dioxygenases

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They differ from oral supplements, which are ingested and absorbed through the digestive system

Why to be leery of online claims The lack of conclusive clinical evidence regarding berberines potential weight-loss benefits is why, in 2022, Frontiers in Nutrition published a systematic review and meta-analysis of 49 studies and concluded that "although [berberine] may affect weight, it does not have a statistically significant and considerable effect" on body mass index