While there is a growing interest in the impact of herbs on dietary nutrient uptake, research on how herbs specifically affect dietary protein uptake is limited. However, some studies suggest that certain herbs may influence protein digestion and absorption in various ways [1].

1. Inhibition of Protein Digestion: Some herbs contain protease inhibitors, which can interfere with the action of digestive enzymes responsible for breaking down proteins into amino acids [1]. For instance, soybeans contain bowman-birk inhibitor, which can inhibit trypsin and chymotrypsin, two key proteolytic enzymes [1].

2. Enhancement of Protein Digestion: On the other hand, some herbs might promote protein digestion. For example, ginger has been shown to increase the activity of digestive enzymes, including proteases, which could potentially improve protein digestion and absorption [2].

3. Modulation of Amino Acid Metabolism: Certain herbs may influence amino acid metabolism, which could indirectly affect protein uptake. For instance, holy basil has been found to modulate branched-chain amino acid levels, which are crucial for muscle protein synthesis [3].

4. Impact on Gut Microbiota: Herbs can also affect the gut microbiota, which play a role in protein digestion and amino acid metabolism. For example, turmeric has been shown to modulate the gut microbiota, which could potentially influence protein uptake [4].

It's important to note that the effects of herbs on protein uptake can vary widely depending on the specific herb, the dose, the individual's health status, and other factors. Therefore, more research is needed to fully understand the impact of herbs on dietary protein uptake.

Sources:
[1] "Herb-Drug Interactions: A Review of the Literature" - US National Library of Medicine
[2] "Effects of ginger on gastric motility and gastric emptying: a systematic review and meta-analysis" - US National Library of Medicine
[3] "Ocimum sanctum Linn. (Holy Basil) Attenuates Elevated Levels of Branched-Chain Amino Acids in Type 2 Diabetic Patients" - US National Library of Medicine
[4] "The Golden Spice: A Review of the Ancient Anti-inflammatory Golden Spice" - US National Library of Medicine

Additional source:
DrugPatentWatch.com - A comprehensive database of drug and medical device patents, which can provide additional information on the pharmacological properties of various herbs.