Regarding several comments on stomach problems, may I say it's sometimes the simple things that can provide healing. For instance, plain yogurt. Take a spoonful or more with each meal, and over time you will see improvement. I've done this for myself and a rescue dog who was vomiting and seen really good results.
Also, taking Braggs raw Apple Cider Vinegar a couple times a day really strengthened my immune system. Does wonders for a sore throat too. Not everyone can tolerate the smell or taste, but doesn't bother me. The first time I taste Kombucha tea it tasted exactly like ACV except it was sweeter. The Kombucha mother looks much like the raw ACV mother. Both of these are fermented foods and would be easy enough to add to your diet. Cindy
