A good starting place is 10mg of #benfotiamine in water.
Take with magnesium (glycinate, taurate) and a B complex.
Increase 10mg every 3-4 days until she notices an effect. Reflect, then continue.
https://www.amazon.com/gp/aw/d/B071W3BJPT?psc=1&ref=ppx_pop_mob_b_asin_title