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S.et al (2009)

But its influence on testosterone is a recent and fascinating discovery

On the other hand, a vitamin B12 deficiency appears to cause a loss of appetite in some people, leading to weight loss rather than weight gain ( That said, the current evidence is too weak to suggest that a vitamin B12 deficiency has any strong or specific impact on weight be it weight gain or loss

With severe deficiencies, dogs may develop neurologic issues, such as seizures

Link Franco, R., et al
