Does anyone know if glutathione exacerbates methylB12 deficiency?

I ask because, since learning of my B12 deficiency, I have done some research online about it. I have found some aggressive B12 protocols around, one specifically that, due to my antidepressant withdrawal, I do not think I could handle (it's way too intense).

The thing that does concern me, though, is that the protocol mentions to avoid glutathione and glutathione precursors, as for some, taking these things (undenatured whey, NAC, etc) exacerbated symptoms. Does anyone here have any opinions or experiences with this?

The reason I am concerned is because I have been eating twice a day some protein bars that do contain whey protein in them. I am eating them at the request of my therapist, as I need to gain weight (I've lost so much weight from both the B12 deficiency and antidepressant issues). I do not mind the bars and actually do like them for the extra protein and range of vitamins that they provide. However, I do not want to jeopardize my B12 recovery if by taking these whey protein bars, they are creating more abundant glutathione in my system, which could be in turn clearing out any unbound, free active methylb12 in my system, which I need for repair and healing on my nerves and brain (I have been having an exacerbation of b12 symptoms lately, mainly memory/brain fog/confusion and some more nerve pains and loss of sensation feelings in some parts of my arms/legs). And, since I am only taking 5000mcg of Puritan Pride as an oral swallowed pill (the sublingual) on an empty stomach, I feel I cannot afford too much glutathione to inactivate the small amount of b12 I may be getting from the Puritan Pride sublingual.

I'm sorry if this question is a little too technical or if anyone even knows if this is the case. I should be OK with eating a couple of whey protein bars a day, and not have to worry about interfering with my B12 recovery?