personal experience using spiro pent clen
when I took like 2 pills a day yes
but then when I upped it to 4.....no way. you can walk and get short of breath, and working out was no fun either.
also at least take an anabolic with clen to help your body out.
maybe primo or soemthing.
you do lose fat on clen but in high dosages it is not pleasant....especially I would imagine if your clean