Two types of Malic Acid
There is L-Malic which is naturally occurring in for instance apples. D-Malic acid is produced artificially. L-Malic acid is the preferred type. E296 can be either.
The amount of malic acid ( as L-Malic) in two apples is about 3 grams (http://curezone.org/forums/am.asp?i=1643682).
The average content of L-Malic is said to be between 0.3 and 0.6 g/100g. The mean value was 0.45 g/100g, with most samples between 0.3 and 0.6 g/100g. Then 1 tblsp (= 15 ml) contains about 0,0675 g malic acid.
Source of info: http://www.kfl.com/oa.html
Apple cider vinegar (ACV)
The malic acid ( as L-Malic) content of ACV is .05 of acetic acid content. Multiply acetic acid content (usually 5%) by .05 to find malic acid content. This would mean that 1 tblsp (= 15 ml) contains about 0,75 gram malic acid.
http://curezone.org/forums/fm.asp?i=487750: In my book I recommend to take about 1500 mgs of malic acid with a few glasses of water per day for 6 days. Apple cider vinegar may be another option (4-8 tablespoons 32 ounzes per day).
The concentration of malic acid in apple cider vinegar is much higher then that in apple juice, probably around 10x.
From: http://healyourselfathome.com/HOW/THERAPIES/ACV.aspx. Malic Acid is a key intermediate “player” in the “Krebs Cycle” – a complex, naturally occurring process within the cell mitochondria, which produces ATP.
The malic acid in magnesium malate binds to any aluminum present in the body and eliminates it, allowing for healthy nerve cell growth and detoxification. Malic acid is also known to cross the blood-brain barrier and bind to aluminum, helping to draw the aluminum away from a particular enzyme so magnesium can plug into the receptor sites instead. The aluminum can now be flushed out of the brain and the body.
This is one of the only ways to get rid of aluminum from the brain other than the complicated method of chelation.
Gall- and Liverstones
Malic acid softens these stones. Most liver or gallbladder flushes require you to drink apple juice or ACV before doing a flush. Apple juice as well as ACV are rich in malic acid.
You need 2 to 3 grams of L-Malic a day taken with food and additional water. Too much can cause cramp and bloating.