On page 5 of the paper you cite, it says:
The oral bioavailability is increased from 4.6 % (parental 7,8-DHF) to 84.2 % (R7).
The Abstract and Conclusions sections make a point that 7,8-DHF is orally active.
But if you read the whole paper you discover that the oral availability is under 5%. (specifically 4.6%)
Although it's 'technically' true that this compound is orally active... practically, you have to swallow
20 times your intended biological dose to see any effects.
This is perhaps, why some users, have been disappointed by 7,8-DHF.
Antaeus labs, for example, were/are offering 7,8-DHF, in 20mg capsules.
In effect, these are equivalent to 1mg dosages.
I seem to remember, that in one of the studies, they were administering 5mg per Kg to mice
(and that's by injection, not orally).
So on that basis, 1mg for a ~75 kilo Longecity guinea pig probably isn't going to
have much impact.
Some simple arithmetic:
Let's imagine that the human equivalent dose of this 5mg/Kg (for mice) is, say, 1mg/Kg.
(Note: In order to ensure publishable results, researchers often max the dosages to
obtain a nice, sizable effect size -- in short, rodents are routinely over-dosed)
But I digress, so 1mg/kg for humans (hypothetically). For a 75 Kilo guinea pig, that would be
75mg as an active dose, ... but note... that would be 75mg, taken by injection.
Orally, we need to multiply that 75mg figure by 20, since oral administration is only ~5% bioavailable.
So 75mg X 20 = 1500mg (based on a hypothetical 1mg/kg dose)
So i repeat my point. I suspect that, some longecity denizens, may have been disappointed
by 7,8-DHF because they simply haven't taken a sufficient dose.
(Please don't read this and think it's okay to take a big dose, as always,
titrate up from a small dose -- and keep notes of your dosages and experiences)
So on this basis, i'm left wondering if anyone has tried 78DHF nasally.
And if so, what dosages seemed, subjectively, effective ?
If you have tried snorting 78DHF, please reply to this thread and tell us about
your experiences.
Best wishes
PG
Edited by playground, 23 January 2018 - 04:10 PM.