What is wrong with grain? Barley, in my understanding, is a very healthy grain. Barley tea from the Orient is considered a healthy drink and helpful in weight-loss and prevention of weight gain. I don't get all these comments about staying away from grains.
I have almost completely recovered from very bad year-round hay-fever type allergies, like a bad cold that lasted for months at a time, simply by giving up caffeine drinks completely and raising the amount of healthy liquids I drink every day, especially barley and/or chicory coffee substitutes. I drink a whole pot of coffee substitute every day, and have done for the last year or so, and have had very noticeable health benefits from it. It took a while to get that result, but there is no question as to what it is that caused the improvement because if I go even a day or two without drinking all that liquid, including my whole pot of coffee substitute (because that is how I can get liquids down best), I start getting my allergies back, but then they disappear again once I get my liquids up again for a couple of days. Doctors say to drink 8 glasses of water daily. I used to drink a couple of cups of coffee, and maybe 2 or 3 maximum glasses of water. This over a long period of time caused me serious chronic dehydration, and several problematic conditions along with that terrible allergy.
People who drink very much of any type of caffeine drinks, unless they compensate by drinking huge amounts of water or other healthy drinks to make up for the fluids that caffeine flushes out of the tissues of their bodies, are almost certainly going to become chronically dehydrated, which can cause many types of conditions and illnesses.