Why do I feel so tired all the time ~40 lbs lost?

Here’s that thread I mentioned: http://community.myfitnesspal.com/en/discussion/10604863/of-refeeds-and-diet-breaks

AshlynnHH wrote: »

I just feel tired to the point I don’t have enough energy to last me all day. After the first 6 or so hours I feel lethargic. I haven’t change my diet or calorie intake and taken my iron pills like I’m supposed to.

Iron pills because you're anemic? I had to experiment with about 5 forms of iron before I found one that raised both my iron AND energy levels. Currently taking iron bisglycinate.

Lots of other things can cause fatigue. For example, if you are bigger and/or active, 1700 calories might not be enough for you. Also, certain foods, notoriously wheat flour, make me tired.

Agree with doctor and bloodwork to rule any medical causes out, and also diet break (great read, that thread!) Vit D helped me, as does appropriate levels of iron. I've also recently put together that I'm sensitive to lower carb intake (sensitive meaning I want to sleep all day). Bumped carbs up to 150g/day and feel much better.

But there could be any number of causes for fatigue, from medically serious to simple and easy to fix. Eliminate as many as possible and work from there.

Check your vitamin D levels!

I live in the cold, dark, and cloudy Midwest and discovered that my vitamin D levels were dangerously low ... seriously have never had so little energy!!

In addition to getting a blood panel, let’s look at your food a bit. You said you are consuming 1,700 calories - what are your stats (height, weight, age)? How fast are you trying to lose (1 lb/week? 2?)?

Depending on your stats, 1700 might not be enough for you.

Let’s look at your food choices. Are you getting adequate protein? Vegetables? Carbs? (A lot of people treat carbs like the devil, but complex carbs are necessary for energy.)

Additionally, you can think about these other things: How many hours of sleep are you getting each night? Do you sleep through the night, or are you restless? Have you started or stopped any medications? Any mental health issues that could be contributing to this?

I get very tired on a low calorie diet. I recently increased mine and I'm feeling much better. Give yourself a week on maintenance calories and see how you feel. If your energy comes back then you've found the culprit. When you cut your calories again go with a smaller calorie deficit. If you don't feel better see your doctor.