Along with Biotin (300mg per day), I've recently started taking Vitamin B12 Cyanocobalamin 1%. (100mg per day).
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Symptoms of vitamin B12 deficiency include:
shakiness
muscle weakness
stiff, spastic muscles
fatigue
incontinence
low blood pressure
mood disturbances
Does any of that ring a bell?
Anyway, the Biotin I am liking a lot. It certainly feels like it is having some kind of beneficial effect.
As supplementary treatments I'll stick with these (and fish oil).
What does everyone else take?