Suikerbuik said:Lol.. What is your point? Processing, needing, metabolizing, .. cells have got the enzymes for it (and I wasn't talking about astrocytes - I know them a bit as I worked with them). Just that the enzymatic balance in cells favor the breakdown of L-lactid acid heavily instead of producing it. And L or D lactid acid is a major differnce. D-lactid is a huge burden especially in the brain because it inhibits those enzymes "needed" in glial cells and is hardly broken down by the liver or other tissue.
Where did you read D-lactic acid is a burden for the brain? Obviously that would be a concern, at the condition it can actually reach the brain. But the fact that the brain carefully uses L-lactic acid otherwise would make this counter intuitive.