Which vitamin deficiency causes insomnia? We explain! OstroVit Insomnia, Cognitive Impairment, or a Combination of Both, Alter Lipid Metabolism Due to Changes in Acylcarnitine Concentration in Older Persons Spercus 1000 50 2.5 10 Tablet Uses, Composition, Side Effects Carnitine Blend Rootcology If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy.