Recommended to be taking a daily vitamin B complex as well
once your serum B12 is over 500 (or Active B12 level has reached 70), you may be able to reduce then stop the B12 and just carry on with the B Complex.
If Vegetarian or vegan likely to need ongoing separate B12 few times a week
Thorne Basic B recommended vitamin B complex that contains folate, but they are large capsules. (You can tip powder out if can’t swallow capsule) Thorne can be difficult to find at reasonable price, should be around £20-£25. iherb.com often have in stock. Or try ebay
IMPORTANT......If you are taking vitamin B complex, or any supplements containing biotin, remember to stop these 7 days before ALL BLOOD TESTS , as biotin can falsely affect test results
In week before blood test, when you stop vitamin B complex, you might want to consider taking a separate folate supplement (eg Jarrow methyl folate 400mcg) and continue separate B12
Post discussing how biotin can affect test results
My T4 and T3 had risen considerably since I started self injecting B12 at Christmas (pernicious anemia extensively in my family, plus I have gastritis)
GP hopeless and said she wouldnt help due to my B12 levels being in range - at that point I had been taking B12 supplements for over 2 years!
Gave up trying to reason 'maybe I had an absorption issue' what with the gastritis plus Hashimotos, and the only reason my levels were ok was due to my supplementing.
So I started self injecting at Christmas.
I have seen some definite improvements, but my iron seems to be worse.
Would the B12 injections have helped raise my T3 and T4 or is that not relevant?
Regarding other vitamins I take a Thorne B complex 3 times a week (includes folate)
Plus vitamin D3/K2 spray 3 times a week - I do monitor levels.
My last Folate test was - Serum folate level 17.7 ug/L [3.1 - 19.9] so fine I think.
I am not vegan or vegetarian, and have a healthy diet - albeit boring without dairy gluten and soy!
Hi I did mention it, and they sent me for a chest xray which was clear, and a full blood count, which produced 'low but in range' Total White Blood Count and Platelets, plus 'highish but in Range' MCV and MCH.
All considered normal obviously.
I do wonder if my having the B12 injections has caused a drop in iron?
As I said before, I am seeing the benefits from the injections I never got with the B12 supplements, but in other regards I feel worse.
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Iron supplementation and TSH levels
Ferritin level, iron maintenance supplementing
High iron saturation 
