I was taking it just for 2 days at 3G per day - however i started feeling more energised about 6 hrs after ingestion.
I took such a high dose as i was doing the Hulda Clark worming protocol for Tapeworm using high dose CoeQ10. I expected to start feeling dodgy like i do on parasite herbs, but instead started to feel great! lol
I've been taking 1G pure extract every other day and am still experiencing mind/body clarity and energy.
The 3G dose lasted for 3 days of energy without having to re-supplement inbetween. I've been experimenting with how it effects me - everyone will be different.
The fabulous thing about Q10 is that it's fat soluble so possible for the body to store it. I've never tested my Q10 levels but considering my response to it i imagine they were low.