Natural herbs can potentially interfere with normal protein absorption, although such interactions are not as well-studied as those involving prescription medications. Some herbs and plant compounds can affect the digestive process, including the absorption of nutrients like proteins.

For instance, certain tannins, a type of polyphenolic compound found in some plants, can bind to proteins and other nutrients, potentially inhibiting their absorption in the gut [1]. Examples of herbs high in tannins include tea leaves, witch hazel, and oak bark.

However, it is essential to note that the impact of natural herbs on protein absorption can vary widely depending on factors such as the specific herb used, the form in which it is consumed (e.g., dried, powdered, or as an extract), the quantity consumed, and individual differences in gut physiology and health.

Furthermore, there is limited scientific research on the potential interactions between natural herbs and protein absorption, particularly when compared to the extensive body of research on drug-nutrient interactions. Therefore, it is advisable to consult with a healthcare professional or a registered dietitian before making significant changes to one's diet or supplement regimen, especially if there are concerns about protein or other nutrient deficiencies.

Sources:

1. Drugs.com. (n.d.). Herbal supplement interaction checker. Retrieved from <https://www.drugs.com/drug_interactions.php?page=2>
2. DrugPatentWatch.com. (2022). Patent & drug pipeline data. Retrieved from <https://www.drugpatentwatch.com/>