vagary

an unexpected and inexplicable change in something (in a situation or a persons behavior, etc.); "the vagaries of the weather"; "his wealth fluctuates with the vagaries of the stock market"; "he has dealt with human vagaries for many years"

आहार संबंधी दोष पूर्ण विश्वासों, सनक और कट्टरता से पोषण तथा स्वास्थ्य पर बुरा प्रभाव पड़ता है।

the vagaries of the weather