They are basically saying that all of these are nothing but fads with no actual scientific support for their claims BUT, in my personal opinion, ACV does work when used as a treatment (meaning temporarily to correct a problem and not every single day forever and ever for no real good reason). I had a U2 that had gassy, smelling poop - I took her to the vet twice for this, she had treatments of two different antibiotics and one of antifungal without any results. I put her on a low dosage of Bragg's for two weeks, stopped for two and did it again for another two and she was cured.
https://www.msn.com/en-us/health/nutrit ... li=BBnb7Kz