munay
Hi,
The Mg malate is a complexed form of malic acid. Seems this one is quite potent (mine is only 100mg of malic acid per capsule). This preparation will supply 825mg of malic acid per tablet which is what you need.
Andreas suggests that 1500 - 2000mg of malic acid be used daily, taken with water throughout the day. Using the preparation described above, you could dissolve two of the tablets in 16oz water and drink it throughout the day. I will take 4 of my capsules 4X/day for the preparation period (typically 5 days leading to the LF).
I got mine from High Vibe, a store in NYC. The one you found on the net seems fine.
Good luck!