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British doctors, there is a symptom that indicates that your body is already severely deficient in vitamin B12. Warn on his lack nails can – spots appear on the plate. They can be blue, gray or even black. However, they do not hurt and do not cause any discomfort.
– Nail bed hyperpigmentation seen in patients with low B12 levels is usually blue-black in color. The pigmentation was more visible on the nails, especially on the thumbs, British experts say.
Besides, streaks may appear on the nails It is also a symptom of vitamin B12 deficiency.
