@emmyk314
Have you been tested for allergies, autoimmune disease or vitamin deficiencies/toxicities? You may want to see a nutritionist/dietitian to suggest additional tests, review diet/supplements, and make recommendations.

Does your bloodwork show signs of inflammation?

How much water do you drink? My understanding is you should have a minimum of 50% of your body weight in ounces of water. You may want to consider adding electrolytes like LMNT to help restore fluids.

If you eat a high protein diet, that may be taxing your kidneys. Do you take any medications? Taking antibiotics can worsen diarrhea. Have you taken a probiotic? Do you eat any fiber?

1. https://pmc.ncbi.nlm.nih.gov/articles/PMC8143080/
2. https://www.genesislifestylemedicine.com/blog/why-am-i-losing-weight-and-experiencing-diarrhea-potential-causes-explained/