Vitamin B12 deficiency is one of India's most overlooked nutritional epidemics. An estimated 40–80% of vegetarian Indians are deficient in B12, yet most walk around undiagnosed, attributing symptoms of brain fog, chronic fatigue, and neuropathy to stress or ageing. Unlike iron or vitamin D deficiency, B12 deficiency can cause permanent neurological damage if left untreated for years — making early detection and supplementation critical.
This guide covers how to recognise B12 deficiency, the best dietary sources for Indians, and which B12 supplements and injections actually work.
B12 is not naturally present in plant foods — vegetarians and vegans must supplement or consume fortified foods. Oral B12 supplements work but are less reliable than B12 injections (especially for those with absorption issues). A simple blood test (serum B12 or holotranscobalamin) can confirm deficiency before symptoms cause permanent damage.
Why B12 Deficiency Is So Common in India
B12 comes exclusively from animal products — meat, fish, eggs, dairy, and fortified foods. Since India has the world's highest percentage of vegetarians (40% of the population), B12 deficiency is endemic. Additionally, several factors amplify B12 deficiency risk in Indians: age (B12 absorption declines after 50), digestive issues (low stomach acid or gut dysbiosis reduce B12 absorption from food), pernicious anaemia (autoimmune destruction of B12-absorbing cells), and medications (metformin for diabetes and PPI medications for acid reflux both block B12 absorption).
Symptoms of B12 Deficiency
Early signs include: persistent fatigue and weakness, brain fog and poor concentration, mood disturbances or depression, numbness or tingling in hands and feet, difficulty with balance or coordination, mouth sores or burning tongue, and pale or yellowish skin. Advanced deficiency causes irreversible peripheral neuropathy, spinal cord degeneration, and cognitive decline.
Best Dietary B12 Sources for Indians
Eggs (1.24 mcg per 100g), Milk and yogurt (0.3–0.5 mcg per 100g), Paneer (0.2 mcg per 100g), Cheese, Chicken (2.4 mcg per 100g), Fish and seafood (10+ mcg per 100g for salmon).
Sources & Editorial Standards
This article was prepared by the Nutsutra Editorial team in accordance with our Editorial & Sourcing Policy. All statistics and health claims are drawn from peer-reviewed research; specific studies are cited inline where referenced. When evidence is limited or contested, we say so explicitly.