This study discusses how C8 caprylic acid stimulates ghrelin - is this contradictory to one of the purposes of brain octane oil? More research is necessary, but is this worrying?
You need to read the full text and not just the abstract:
Older studies show that caprylic acid provides the C=0 and energy required to combine the amino acids needed to take proghrelin to ghrelin.
This new study aims to look at the posibility of ghrelin produced in the stomach mucosa reaching the pituitary gland.
The step missing is the increased acylghrelin in the plasma, because of course, it needs to be transported somehow, right? Funny enough, this study:
Published months beforehand tests this and shows that there was no significant increase in plasma acylghrelin.
The moral of the story is that abstracts are very misleading, and even more misleading is how bloggers use abstracts to "prove" all sorts of things. You need to read the entire article and see what was done and how they did it.