Answer:
Likely nothing.
Water is two atoms of hydrogen bonded to a central atom of oxygen. This does not vary at all depending upon the country of origin, be it Japan, America, Tibicos, or Upper Yidland.
Water crystals result from the incomplete transition between the solid (ice) and liquid phases of the chemical. (Think of the stuff you scrape off the inner walls of your freezer.)
While water is essential to human life, you probably get enough from your daily intake of fluids and foods. Don't waste your money on mystical-sounding garbage like "tibicose water crystals."
......I left the previous answer there, just because it's ignorance and lack of research amused me. Water Kefir, tibicos, or Japanese Water Crystals are a pro-biotic mix of healthful bacteria and yeast suspended in a polysaccharide matrix. They can be used to ferment the sugar out of fruit juices, and produce a wonderful carbonated alternative to beer or soda. They increase the gut flora (healthful bacteria in the intestine) thus aiding in digestion.
.... Wow. The original answer is hilarious. He actually thought that "tibicos" was a place. Water crystals, aka water kefirs, are known for their diuretic, depurative and regenerative properties, therefore aiding the body's long term defense against multiple diseases.