Depends
4545......
I have already written a couple in-depth articles on how to dose DNP, especially if you are going to use T-3 or Clen with it.
I think you are o.k. with going up to 600mg, but I would probably do a couple of minor tweaks.
First, as for your dosing question, DNP has a half life of 36 hours, with a maximum punch somewhere around 4 hours after injestion depending on the exact factors (what is in your stomach, etc.) Therefore, you can do a little math to figure out exactly how to divide your doses. I think you are fine taking 400 mg/day to start....but you aren't going to know for sure until day 3, when your levels are about at their peak. Day 4 you are getting fade and the same rate you are getting build-up (maybe a little worse effects from 4-6 hours after injestion). When you get ready to up to 600mg, watch your reactions very closely. Again, you are not going to notice this immediately, but because of the mathematics you will probably start really feeling the extra punch on the fourth dose (day 1.33) If you are going to increase to 600, do it on day 5.
As for how to separate the 600mg throughout the day, that is a little about personal preference. Remember that you peak at 4-6 hours, so if you take it at 10pm you are liable to wake up at 2am with some pretty bad sweats. However, be careful not to front load your day too much, or the 36 hour half life will catch up with you....making you miserable. With all that said, here is what I think personally works the best for tolerable sides: Take your 400mg at 8am and 4pm. On the day you are going to 600, take your first dose at 8am, your second at 1:30pm and your final at 7pm. This should allow you to have a little rest at night, but you are going to have a pretty miserable time from about 6-midnight. Also, with this routine you should plan on doing your training right before your 8am dose....this will give you the highest ability to maximize your workout based on this being the time during the day your levels will be at their lowest.
As for carbs, there is a metabolic reason you cannot carb deplete while on this program. You CAN carb deplete prior to starting DNP, but once you take that first pill it is vital to keep some carbs in your diet. I would recommend getting between 25 and 40% of your calories from carbs. If you go to low, you are going to be miserable without getting the results you want.....DNP needs a little glycogen to properly function (Very detailed analysis available if you want....) However, and this is where people go wrong......do not eat fast acting sugars, or you are going to burn up!!! Eat slow acting carbs like potatoes, yams, long grain rice, etc. Unless you really want to enter the 6th ring of Hell, stay away from fast acting sugar like chocolate, pie, sweet tea, sugared coffee, etc. I can tell you from personal experience you will be in a bathtub full of ice water if you combine 600mg with a Mrs. Fields lemon bar.
Please make sure you are taking plenty of the required anxillary meds....ie anti-oxidants, ALA, etc. Also, you want to ensure you are drinking at least 2 gallons of water a day. The more water you drink, the better you will feel and the more results you will get (Helps remove the metabolic waste). Also, plan to drink at least 16-32 ounces of V-8 per day. (You need the potassium)
Hope this helps....for more info do a search on my name and type in DNP
Kemo