Andrew Huberman 40 to 50 grams
That pressure is what causes the classic symptoms: localized pain, radiating pain down a leg (sciatica) or arm, numbness, tingling, and muscle weakness
It also causes sunburn, which can lead to peeling, sensitivity, and long-term pigmentation
Of course, older adults, people over age 50 in particular, tend to have the lowest B12 levels, though vegetarians and those who have undergone gastric bypass surgery are also at a higher risk
Because youre promoting angiogenesis, youre increasing blood flow and growth
But their mechanisms of action, involving both neuroprotection and immune modulation, have drawn attention from researchers studying neuroinflammatory conditions