This looks interesting. It's only concern for me is its ability to freely cross the blood brain barrier.

There is a need to be cautious with substances that can directly cross the blood brain barrier. From what I have read, it looks like L Carnitine may be the better form. The body converts it to Acetyl-L-Carnitine.

When the body moderates the amount in the blood, it is usually a safer amount.

This is similar to the 5-HTP vs L-Tryptophan issue. The body moderates the amount of 5-HTP that is produced from the L-Tryptophan whereas ingesting 5-HTP directly can cause an overdose of 5-HTP and its metabolite (serotonin).

I prefer to providing the substances for the body to convert to the needed substance.

The blood brain barrier has a very important function. Defeating it can be problematic, especially to a compromised brain.