VLCDs often severely restrict the intake of essential nutrients, including vitamins, minerals, and protein. Prolonged deficiency can result in health problems.
VLCDs can lead to muscle loss that can lead to weakness, fatigue, and compromised physical performance.
Rapid weight loss through VLCDs can slow down metabolism. This can make weight regain more likely once normal eating patterns are resumed.
Potential risks include electrolyte imbalances, gallstones, irregular heartbeat, hair loss, dizziness, and fatigue.
VLCDs are often difficult to sustain over the long term due to their potential side effects. The extreme calorie restriction can lead to stress.