The buildup of waste in your bloodstream from kidney failure disrupts your sense of taste. Food typically tastes salty, bitter or metallic to people experiencing this condition. Your appetite decreases, because of this change while food avoidance becomes more likely. Your loss of appetite because of weight loss, leads to progressive weakness throughout time.
Kidney failure patients experience decreased appetite, because toxins disrupt their digestive system and send brain signals. The early detection of this sign matters, because proper nutrition helps your body recover from illness sooner.

References
Healthdirect.gov.au: Kidney failure symptoms and causes
LifeOptions.org: 15 symptoms of kidney disease
NHS.uk: Chronic kidney disease symptoms
National Kidney Foundation (kidney.org): Signs of kidney disease
Cleveland Clinic: Kidney failure symptoms and stages
Stanford Health Care – Kidney failure symptoms

Disclaimer: The information in this article aims to educate readers about health matters while avoiding medical advice.