Essentially there would be no point in enteric coating a hydrochloric acid supplement. Enteric coating serves only 1 purpose, and that is to protect particularly vulnerable ingredients against destruction by stomach acid, so that they can survive the initial digestive process to reach the bloodstream with full properties intact.
Hydrochloric acid IS stomach acid! So you are basically adding stomach acid to stomach acid. There would be no reason for it to need protection against itself.
With regard to the uses of hydrochloric acid supplements, it must be Betain HCL, such as we have in our Total Balance formula (which is enteric coated, but for the protection of many of our speciality ingredients in that formula).
Here is some further info on Betain HCL in case this helps you.
Betain HCL is a non-essential nutrient and a source of hydrochloric acid, helping toward the proper break down of fats and proteins. It is necessary for the metabolizing (absorption) of protein, calcium, vitamin B12, and iron.
It is also of course known simply as Hydrochloric acid (or stomach acid). The low pH of the stomach’s hydrochloric acid allows it to digest any bacteria and micro-organisms that might have been ingested.
There are no food sources of Betain HCL, but it is naturally produced in the parietal cells of the stomach.
Betain HCL treats many conditions including high homocysteine levels (related to heart disease). It may also be beneficial in treating anaemia, asthma, gall stones, indigestion and heart burn.
Other conditions that could be improved with Betain HCL supplementation include, rheumatoid arthritis, thyroid problems, tic dolorous, vitliglio, arteriosclerosis, diarrhea, allergies, malabsorption, and rhinitis (inflammation of the nose).
There are no known side effects with taking Betain HCL, but it is possible to overdose on this supplement so it should only be taken in advised safe doses.
I hope this helps.