Sometimes you forget how old the internet is, and Google searches will take you into the last millennium if you're not careful.
Makes me feel even older now!
@NoCrbs4Me I suggest you read more recent papers 1997 is a long time ago in this field. . A good start would be those more recent papers that reference the paper. Start with the review at the bottom of the list which outlines why it was thought even by 2004 that there was no 'net or even bidirectional transfer' of lipoproteins across the BBB But this is really off topic so I won't add any more.
"It had long been thought that the blood brain barrier (BBB)
prevented the transport of lipids from the bloodstream into neurons
in the brain [19]. However, it has now been shown conclusively that
mechanisms exist to promote transport of LDL intact across the BBB
via an LDL-receptor mediated mechanism in astrocytes [20]."
"It had long been thought that the blood brain barrier (BBB)
prevented the transport of lipids from the bloodstream into neurons
in the brain [19]. However, it has now been shown conclusively that
mechanisms exist to promote transport of LDL intact across the BBB
via an LDL-receptor mediated mechanism in astrocytes [20]."
I'm sorry but I feel I must respond circular argument somewhat Just check the reference, it is to the same 1997 paper (and also the qualifications of the authors) Honestly I think that people who research in the field have far more credence