Having a hard time with food

I would see a doctor. Esp if hair falling out. In another thread you mention long term Insulin Resistance- this also causes hair to thin or fall. I’d have your hormone levels checked. Are you managing the calorie intake with a IR friendly diet?

Yes, it sounds like you're undereating, especially if you only eat 1200 calories per day and exercise on top. Say you burn 300 calories with a strenuous workout and you only eat 1200 calories. That's pretty much the same as not working out and only eating 900 calories. Even a toddler needs a lot more than that. Don't go fast. Go sustainable. Yes, it will of course be slower, but what's the point in going fast if you crash now already?

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As it relates to diet only, the reason I mentioned fat intake is because a very low fat diet can have a crucial effect on essential fatty acids needed for hair health.

For example; fatty molecules and specifically prostaglandins contribute very much to hair growth but when deficient can contribute to a change in hair texture and increased risk of hair loss. In order for the body to produce prostaglandins they also need an omega 6 fatty acid called arachidonic acid and without sufficent AA the body won't make enough prostaglandins.

As well, very low fat diet generally effect the nutrient absorption of fat soluble vitamins A, D, E, and K which can lead to deficiencies that effect hair health. Also very low fat diets can effect hormone production of estrogen, cortisol, insulin, leptin and progesterone which are also essential for hair health. Add a very low calorie intake, that also can lead to other nutrient deficiencies and stress, both effect hair health. All of this also effect menstrual cycles and a very low fat diet can contribute to PCOS as well, just mentioning that and may not apply to you.

I suspect with your protein comment that your consuming a very high carb diet and most people have been programed to think low fat as well, which has been the basic advice for the last 40 years, I may be wrong, it's just a guess.

If you are consuming a high carb low fat diet and consuming those few calories there is a good chance your dizziness could be from the exercise increasing the demand for glucose which increases the production of insulin driving blood glucose levels lower which can induce hypoglycemia causing dizziness. It can also be dehydration.

Getting back to the prostaglandins and arachidonic acid which are essential for hair and good health in general start with our omega 6 intake. There is a vast difference between the omega 6's in plant and animal food. Plant food omega 6's are derived from LA (linoleic acid) and converting to AA is a lengthy process for the body to make.

First LA is converted to gamma-linolenic acid (GLA) by the enzyme delta-6-desaturase, then this GLA is elongated to dihomo-gamma-linolenic acid (DGLA) by the enzyme elongase, then this DGLA is further desaturated to arachidonic acid (AA) by the enzyme delta-5-desaturase. Basically this is a 3 step conversion which is not very efficient and that conversion rate is anywhere from 1% to 10% and if you happen to be vegetarian that would be more towards the 10% because of the overall time spent doing this conversion making it more efficient, but still not really enough if someone was also consuming very little fat.

I know this is more information that most people want but it is I believe important for you to know and I would highly recommend that you talk to a Dietitian that hopefully understands, your Dr. probably doesn't. Basically, a mostly plant based diet very low in fat might not be the best course of action if that's your protocol, imo.

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You said limit, but 1200 calories is the Minimum NOT the Maximum that you need to run your body. Do NOT eat below it. I speak from (accidental) experience. In the beginning, I actually started logging my food to watch my food intake to figure out why I was almost blacking out and losing my hair, not for weight loss. I wasn't trying to purposely lose weight at the time, I was just very depressed (my mother had just died) and not eating enough as it turned out (like 900 cals and 10 g of protein). I just wasn't hungry.

Also, you need to eat your exercise calories back because you're burning off part of those 1200 calories when you exercise, so you need to eat those calories back to give your body enough energy/calories/nutrition to properly run and not be in a malnourished state. For example, let's say you burned 400 calories, 1200-400 = 800 calories left over for your body to use, which isn't enough, so you need to eat those 400 calories back to get to 1200 calories to avoid malnutrition).

Also, I'd watch your protein (and fat) intake. When mine was too low, it made me have dizzy spells and I almost blacked out whenever I'd bend over and then straightened back up. After I upped my protein to the appropriate level, it stopped after I'd eaten enough protein for several days and my body caught up with me. Also, my hair stopped falling out. Your hair will also fall out if you're not consuming enough protein (and fat) since one of the building blocks of nails and hair is enough protein (and fat). Your body will prioritize the protein you eat to maintain your necessary body functions, which hair growth isn't. You don't need to grow hair to live.

You might also want to look into hypothyroidism as hair loss is a symptom of too low thyroid hormone level (I'm hypo myself).