A senior neurologist at Apollo Hospitals in Hyderabad has highlighted a surprising health risk among gym-goers: vitamin B12 deficiency, even in those following high-protein, meat-heavy diets.
Dr Sudhir Kumar shared the case of a 25-year-old software engineer, Rohan (name changed), who experienced persistent fatigue and numbness in his feet despite a disciplined fitness regimen and carnivore diet. The turning point came when Dr Kumar noticed darkened skin over Rohan’s knuckles—a subtle but telling sign.
Blood tests revealed critically low levels of active vitamin B12 (10 pmol/L), despite Rohan’s meat intake. Further investigation confirmed pernicious anemia, an autoimmune condition that blocks B12 absorption in the gut.
“Diet alone isn’t always enough,” Dr Kumar shared on X. “If the body can’t absorb nutrients properly, even the fittest individuals can face serious deficiencies.”
Rohan responded well to intramuscular B12 injections, with symptoms improving within weeks. The case underscores the importance of active B12 testing and early intervention to prevent nerve damage.
Vitamin B12 deficiency can occur even in meat-eaters. If your body can’t absorb it properly, diet alone may not help," the doctor noted. "Watch for subtle signs—like unexplained fatigue, tingling in feet, or skin changes like darkened knuckles. Active B12 testing is more accurate than total B12 levels in some cases. Early detection and treatment can prevent nerve damage and restore vitality," he advised.
“Health is more than diet and discipline—it’s about listening to your body. Even the fittest among us can miss what lies beneath,” Dr Kumar said.
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