not essiential.........more important is your diet on dnp
don't worry about the whole t-4 -----> t-3 conversion
thats why you go on and off 8-10 day cycles.
but! if you do a low dose i don' think there is enough heat to destroy or interupt that conversion in the liver so you can run it for longer periods of time.
30 days 200mg worky slowly but the key word is "they work"
short cycles work too but you get very water retained and hot and they can cause (at least for me) cravings which lead to binge eating. you need to focus while you are doing dnp. don't waste such a power ful tool by eating shity