Proof of Identity. Proof of identity must be presented with all passport applications. Acceptable forms of identification include a passport, naturalization certificate, driver's license, military ID card or other current government-issued ID. A photocopy of the identity documents also must accompany the passport application.
Betaine, or TMG, is also involved in the manufacture of carnitine, and helps protect the kidneys from damage. Betaine HCl, or betaine hydrochloride, is an supplemental, chloride-salt form of betaine that is useful as a digestive aid.
Studies in rats suggest that betaine may help protect against harmful fatty deposits in the liver. These deposits can be caused by alcohol abuse, obesity, diabetes, and other causes. Preliminary studies in people have shown similar results. More research is needed.