Has anyone tried a water fast where you allow broth?

I read Dr. Fung‘s book on fasting. In it, he talks about using homemade broth to help extend fast. I’m a 40 yr male 6ft 190lbs. I’m interested in extended fasting for chronic inflammation and joint pain. I could to lose 10 pounds but I don’t want to end up malnourished. I have completed five 42 hour fast. With good results. I use fasting salts. Looking for any thoughts or advice.