There are two water soluble vitamins that can be synthesized by some animals but not by others, including humans: Vitamin C (Ascorbic Acid) and Vitamin B12 (Cobalamin). Therefore these vitamins would not be essential nutrients for all species. For your main post, choose one of the these to discuss. Do you feel you might be at risk for deficiency? What are the consequences of deficiency? Include food sources and how certain dietary choices affect the vitamin’s status. Is it better to obtain the vitamins from food or supplements. Are there toxicity issues with the vitamin of your choice? Feel free to include your own personal experiences, if applicable