As far as stomach acid, unrefined sea salt, like the Celtic Gray salt, tends to work very well.
I definitely agree. I personally use Redmond's "Real Salt." Here's a link with some info on healing low stomach acid naturally.
http://empoweredsustenance.com/heal-low-stomach-acid-naturally/Here's what the link has to say about cabbage -
"”Vitamin U?” You may be thinking, “I’ve heard of A, B, C, D, E, and K… but not U!” That’s because it’s not a real vitamin, just a label for a powerful healing enzyme found in cabbage. It is applauded for it’s anti-ulcer abilities and quickly cures stomach ulcers and heals the stomach lining. When stomach acid has been chronically low for years, the stomach lining may be inflamed and unable to tolerate acid supplementation. In this case, vitamin U is useful in soothing an inflamed stomach lining and correcting low stomach acid. "
A google search for "low stomach acid natural cures" will yield even more results.
For your digestive problems, I definitely recommend fermented foods. You can make your own sauerkraut, pickles, kimchee etc. which will be rich in probiotics which will help heal your gut. However they have to be naturally fermented and home made.
Here's a link on sauerkraut (fermented cabbage).
http://www.wildfermentation.com/making-sauerkraut-2/Here's a link on my favorite pickle recipe.
http://www.marksdailyapple.com/naturally-fermented-dill-pickles/In addition to fermented foods, I'd recommend temporarily eliminating complex carbs, and possibly trying a high fat raw-specific carbohydrate diet. It would only be temporary till some healing in your gut takes place. The SCD (short for specific carbohydrate diet) can also help candida.
I'd also suggest making sure your enzyme pathways are functioning optimally. Low nutrient levels can hinder enzyme function, which could cause problems in digestion. The poor digestion could increase the amount of food that goes undigested, which would then feed bacteria in the gut, worsening your candida and digestive issues. So increase your consumption of magnesium, zinc, manganese, and possibly other nutrients.
http://www.naturalnews.com/023511_magnesium_body_deficiency.html""Enzymes are protein molecules that stimulate every chemical reaction in the body. Magnesium is required to make hundreds of these enzymes work." - Dr. Carolyn Dean"
http://lpi.oregonstate.edu/infocenter/minerals/zinc/"Over 300 different enzymes depend on zinc for their ability to catalyze vital chemical reactions. Zinc-dependent enzymes can be found in all known classes of enzymes (4)."
http://lpi.oregonstate.edu/infocenter/minerals/manganese/"Manganese (Mn) plays an important role in a number of physiologic processes as a constituent of multiple enzymes and an activator of other enzymes (2)."