Cobalt(II) gluconate is primarily used as a nutritional supplement to address cobalt deficiencies in humans and animals. Cobalt is an essential component of vitamin B12, and this compound helps in the synthesis of this vital nutrient, supporting red blood cell formation and neurological function. In agriculture, it is added to animal feed to improve livestock health and productivity, particularly in regions where soil cobalt levels are low. Additionally, it finds application in the production of energy drinks and dietary supplements aimed at boosting energy and combating fatigue. In some cases, it is also utilized in medical treatments for anemia and other conditions related to cobalt or vitamin B12 deficiency.