Have you been tired the whole 4 weeks you've been on atkins?
Is this your first time doing atkins?
Are you getting at least 8 hrs sleep?
Are you taking a good multi vitamin?
Did you do a true induction for 2 weeks?
Water helps flush out the fat and toxins....get at least 32 oz a day!
For some, it takes about 6 weeks to get over the "withdrawals" atkins draws out. This may have alot to do with your tiredness.
Im also thinking, if you didnt do induction for 2 full weeks, your body may have not switched its fat burning mode yet. The 2 weeks induction gives your body a chance to switch from carb/sugar burning first, to fat burning. This usually takes a body 6-10 days to do. Thats when you should have felt tired. This may be why you are still tired.
Well, answer these questions, and we will see if I or anyone else can come up with some more answers for you.