Could sugar intolerance, your inability to metabolize sugar and carbohydrates, be the problem instead of sugar itself?  Sugar intolerance is a malabsorption issue, leading to fatigue, bloating, gastrointestinal distress and anemia.

Consider the issue could be you’ve been oxidizing free fatty acids for some time now, producing too much lactic acid and thus slowing your energy metabolism down over time.  Caused by eating too much protein and not enough healthy carbohydrates, eating the wrong fats and by doing too much activity without replenishing your energy reserves.  Basically burning yourself out.

I’ve been one of those people.  Years ago when I was experimenting with the low carb diet, I eliminated dairy, fruit, root veggies, grains and anything that contained sugar.  This was my "so called" solution to what I thought was candida.