Glucose itself is not inherently toxic; however, imbalances in glucose levels can lead to health issues. Hyperglycemia, or elevated blood glucose, can result from conditions such as diabetes mellitus. Chronic high blood sugar levels can cause damage to organs and tissues, leading to complications like kidney damage, neuropathy, and cardiovascular disease. Conversely, hypoglycemia, or low blood glucose, can cause symptoms ranging from dizziness to seizures.