tumeric bioavailability

Although tumeric is considered a viable neuroprotectant the only research study I was able to find regarding its bioavailability after ingestion of this supplement seems to show that it has low oral bioavailability in humans. This is because it may undergo intestinal metatbolism. This raises the question as to whether the active constitutents of this herb can cross the blood/brain barrier and perform its antioxidant activity as a neuroprotectant.

http://www.ncbi.nlm.nih.gov/pubmed/11448902?dopt=Abstract