Ahh, Ok, so I dug a little deeper into that and this was what I found.
INFORMATION ON MANUFACTURER WEBSITE
Ingredients: magnesium carbonate (when dissolved, Natural Calm becomes magnesium citrate)
Non-medicinal ingredients: Citric Acid.
Free from animal products, sugar, artificial sweeteners, flavours or colours, gluten-free, sugar-free and Non-GMO.
Mechanism of Action: The citric acid combines with magnesium carbonate to create magnesium citrate, one of the most absorbable forms of magnesium available.
Nutrient Value, per 1 teaspoon (2.5 grams): 205mg of magnesium
The unflavoured version of our Natural Calm does not contain any corn or derivatives of corn.
Natural Calmâs magnesium is extracted from ocean water. The citric acid is sourced from sugar beets.
CITRIC ACID
The information from the website didnât quite satisfy regarding the use of a possible filler. So I looked into how this citric acid is extracted from sugar beet exactly. The word âsugar beetâ was already making me worry.
It seems the citric acid is a by-product of some microbial action in sugar beet fermentation.
MAGNESIUM CARBONATE
So that didnât satisfy either regarding whether or not there was a filler. But then I remembered that Magnesium Carbonate is a white solid salt. Could it be that this removed the need for a filler and that the resulting mg of elemental magnesium citrate is the amount created in the magnesium carbonate + citric acid reaction?
There has to be some sort of chemical formula to confirm this 