If you start from low levels, then yes, as long as you keep your blood levels in check. It would take a while to overdose it this way, but it's not impossible.
i cant find it now. It was an article that suggested you may underestimate your natural production, especially in summer, so its safer to use high doses for a period of 3 months or so with a break of the same duration, after all we are likely “accustomed “ to fluctuating supply through the year.