Is it okay if you use a super tampon for a regular period?

Answer 1

No, you should always use lowest absorbency for your flow.

Tampons don't just absorb blood they also absorb vaginal moisture, this means tampons dry-out vaginal tissues causing splitting and ulceration which give TSST-1 toxins responsible for TSS a more direct route into your bloodstream. For each 1g increase in absorbency TSS risks increase by 33%, thus using lowest absorbency tampons for your flow is very important to reduce risks.

Answer 2

You should only ever use the correct absorbency for your period. Higher absorbency is not only more uncomfortable but also increased risks of Toxic shock syndrome. If the tampon leaks within 1-2 hours it's safe to use the next absorbency up, but if not saturated after 4-6 hours then you need to use a lower absorbency or switch to pads. If you don't have correct tampon absorbency then get the correct absorbency or use pads until you have the tampon absorbency that you need.