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AIIMS-trained gastroenterologist reveals early warning signs of 5 key nutrient deficiencies: Brain fog, fatigue and more

Published on: Nov 4, 2025, 13:58:12 IST
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Feeling tired even after a good night's sleep can be a sign of nutrient deficiency. (Unsplash)
Feeling tired even after a good night's sleep can be a sign of nutrient deficiency. (Unsplash)

Nutrient deficiencies often show up as subtle symptoms like persistent hunger and tiredness. Dr Sethi highlights the early symptoms of 5 such nutrient gaps.

When it comes to nutrient deficiencies, the body often sends out subtle warning signs long before the more obvious symptoms appear. However, many people mistake advanced signs like hair loss, fatigue, or constipation as the earliest indicators - when in reality, the deficiency has already progressed by that point. Recognising the body’s initial, less obvious signals can make a crucial difference in identifying and treating deficiencies early, preventing long-term health complications.

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Dr Saurabh Sethi, a gastroenterologist trained at AIIMS, Harvard and Stanford Universities, has revealed the earliest warning signs of five nutrient deficiencies.In an Instagram post shared on October 4, the gastroenterologist highlights several symptoms often mistaken for early deficiency signs - and reveals what the true early warning signals actually are.

Fibre deficiency

According to Dr Sethi, the first sign of fibre deficiency isn’t always constipation as many believe. It often shows up much earlier - as feeling hungry soon after eating, even after a seemingly satisfying meal.

Protein deficiency

The first sign of protein deficiency is often mistaken for muscle loss. However, the gastroenterologist explains that the earliest red flags are persistent tiredness and brain fog.

Calcium deficiency

Dr Sethi stresses that calcium deficiency does not always show up as weakness in your bones. Instead, it’s the tingling sensation or numbness in your fingers that signal deficiency of the nutrient.

Nutrient deficiencies can show up as these early warning signs. (Image generated via ChatGPT)
Nutrient deficiencies can show up as these early warning signs. (Image generated via ChatGPT)

Zinc deficiency

According to Dr Sethi, “The first sign of zinc deficiency isn’t reduced appetite”. He points out that a “loss of taste or smell”, along with slow-healing wounds, are more telling warning signs.

Iron deficiency

The gastroenterologist states, “The first sign of iron deficiency isn’t hair loss or dark circles. It’s feeling tired even after a good night’s sleep.”

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. It is based on user-generated content from social media. HT.com has not independently verified the claims and does not endorse them.

  • Eshana Saha
    ABOUT THE AUTHOR
    Eshana Saha

    Eshana Saha is a fresh face in lifestyle and cultural journalism, bringing a refined, multidisciplinary perspective to the intersection of entertainment, fashion and holistic wellbeing. With less than a year of professional experience, she has quickly adapted to high-pressure editorial environments and currently works full-time with HT Media. Prior to this, she interned for nearly six months with Hindustan Times’ entertainment and lifestyle vertical, where she gained hands-on experience in digital reporting, trend analysis and editorial storytelling. Based in New Delhi, Eshana specialises in comprehensive coverage of major cultural moments — from international film press tours to the curated aesthetics of global fashion showcases, award shows and music-centred events. She holds a Bachelor’s degree in English from St Xavier’s University, Kolkata, and a Master’s degree in English from the University of Delhi, equipping her with a strong academic foundation and a keen ability to deconstruct complex cultural trends into clear, high-impact narratives. Beyond the red carpet, Eshana has developed a growing focus on health and wellbeing reporting. She bridges the gap between celebrity-driven trends and practical, evidence-informed lifestyle advice, ensuring her work remains both aspirational and grounded in editorial rigour. She has extensively covered the health implications of Delhi’s air pollution crisis, while also playing a key role in amplifying expert-led insights on women’s health and mental wellbeing, helping translate complex medical perspectives into informed, impactful public awareness. An artist at heart, she explores multiple creative forms — from visual arts and music to culinary experiments — and brings a creative’s eye for nuance, texture and detail to every story. Whether analysing runway dynamics or examining emerging wellness movements, she remains committed to accuracy and the highest standards of contemporary journalistic ethics.Read More

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