Harnessing mushrooms for poultry nutrition: Boosting health, immunity, and productivity ScienceDirect Nutritional Value of Mushrooms: What Makes Fungi a Nutritional Powerhouse HealthcareOnTime Button Mushrooms Health Benefits, Due to their exposure to UV rays or sunlight, mushrooms are a natural, non animal source of vitamin D2 thats capable of increasing blood levels of this vitamin as The nutritional benefit of mushrooms is remarkable. For centuries, mushrooms have been legendary for their nutritional value. But it's only been recently that mushrooms have been studied and their true power revealed.