@Mossy thanks. Sorry the late response, as I was not notified about it.
I have read this before. However, it is a bit confusing with what Haidut says, as in the text you attached, he mentions that there is no advantage of taking oral stressNon, but then in a video interview with Dr Mercola, he mentions how pregnenolone dissolved in SFA will bypass first metabolism in the liver, that means a 5mg dose of Pregnenolone will be almost 100% bioavailable, so theoretically when it is taken orally, the rule 10:1 can still be applied in this case.
What is more confusing is that he mentions that a oral dose for full replacement is 30/50mg, and I assume orally with first pass metabolism, but with stressnon could probably be 3/5mg then.
However, when someone is very low on Pregnenolone, 100mg of oral micronized Preg, generally takes levels to mid range.