About 6 months ago i noticed i was shedding hair. i had low B12 a few months ago, but have been taking vitamins since (my B12 is now normal). now, as far as i can tell my hair is thinning, but not receding. since at every hair loss site i look there’s the NW scale for hair loss, which shows the hairline receding gradually, i’m wondering – is overall thinning a form of MPB? could this be something else?
You are asking two different things here. MPB stands for “male pattern baldness” and just as the name implies, the hair loss would be seen in a “pattern”. Diffuse hair loss would have no pattern. Either form can be genetic, but the diffuse loss may be caused by diet, vitamin deficiencies, or many other conditions.
I assume you saw a physician for your B12 deficiency diagnosis, and I would suggest you should see a doctor that can make a diagnosis for you about your hair.