Water

Yes, water is an essential nutrient.

An essential nutrient is a substance that the body needs for normal functioning but cannot synthesize itself or cannot synthesize in sufficient quantities, and therefore must be obtained from the diet. Water fits this definition because:

• It is vital for numerous bodily functions, including regulating body temperature, transporting nutrients and oxygen, lubricating joints, and removing waste products.
• The human body cannot produce enough water internally to meet its daily requirements.
• Consistent intake of water is necessary for survival and health.

Without adequate water intake, the body's systems begin to fail, leading to dehydration, impaired bodily functions, and eventually, death.