Gastroenterologist identifies five key nutrient deficiency warning signs

Gastroenterologist Dr. Saurabh Sethi identified early warning signs for five key nutrient deficiencies. These subtle symptoms can be easily overlooked. He noted that persistent tiredness and brain fog can indicate protein deficiency, while tingling fingers may signal low calcium. Fiber deficiency can manifest as early hunger, and zinc deficiency as loss of taste or smell. Iron deficiency's initial sign is fatigue despite adequate sleep. These insights were shared on Instagram on October 4, 2025.