The best replacement for carbonate is citrate.

The best alternatives to carbonate are rated as following:
★★★★★  citrate
★★★★  calcium citrate
★★★  sodium bicarbonate
★★★  bicarbonate
★  calcium gluconate
★  calcium citrate absorption
★  soda ash
★  calcium lactate
★  calcium phosphate
★  cesium chloride
★  carbonite
★  clastic
★  carbon trioxide
★  silicate
★  lithium ornate
  calcium
  lithium orotate
  orotate
  siliceous aggregate
  coral calcium
  hydroxide
  citrate better
  potassium carbonate
  talc
  carbamate
  sodium carbonate
  ammonium bicarbonate
  calcium chloride
  lithium citrate
  mozy
  baking soda
  sodium hydroxide
  oyster shell
  oyster shell calcium
  silicate builders better then phosphate
  chloride
  ground calcium carbonate
  copper oxide
  oxide
  tums
  calcium orotate
  calcium acetate
  caltrate
  quest helper
  calcium stearate
  copper ii carbonate
  calcite

Your alternative for carbonate is not listed? Suggest!
Speaking about carbonate, one probably shouldn't forget about acid.

Other search terms related to carbonate and their ratings are:
★★★★★ acid
★★★ hcl
★★★ acid reaction
★★★ hydrochloric acid
★★ sulfuric acid
★★ nitric acid
★ silver nitrate
★ calcium chloride
You have in mind a companion for carbonate and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of carbonate in all years. Click on graph for more.
carbonate
citrate
calcium citrate