85! That is terrible. Are you sure about that, and not reading another value close to it? Sometimes the readouts are narrow and single spaced and easy to confuse.

You need to be on methylcobalamin NOW...ASAP. 5mg on an empty stomach for 3 months, and have a retest.

Your nervous system, and visual abilities will really start to change radically being that low. You know I think 85 is one of the lowest ever brought here! WHEW!

iherb.com, Puritan's Pride and Swanson's, Vitacost, Amazon, all easy and inexpensive. Please do this for yourself and don't wait for doctors. Even with the old outdated lab ranges going down to 200 ...you are far lower than those!

I think you can spring for the 5mg of methylcobalamin... there is not enough in that mixture you are using now. You can go back to it if your blood levels normalize in 3 months. I hope you are taking that product on an empty stomach? If not the B12 will not be absorbed.

Why are you low?
1) are you taking OTC acid lowering drugs?

2) you could have low stomach acid called achlorhydria.

3) you could have inherited pernicious anemia from a relative. Or you have an autoimmune disease that is attacking the parietal cells of the stomach that make intrinsic factor (this is what carries B12 from food into your blood stream).
Did you have any CBC abnormal results? The MCV in the CBC typically elevates before anemia starts. So elevated MCV might show up. Doctors typically ignore this, because they don't understand it. MCV = mean corpuscular volume of the blood cells showing abnormally large cells in a given volume of blood serum.

4) if you are not eating meat/eggs/dairy/seafood/ and are following a vegan lifestyle, you can get low.

Those are the main causes that people can commonly have.

You'll have to ask the specialist about the proteins in the blood.
Also show him the copy of that B12 result too... that ought to spark an
interesting conversation!