injections

Happy New Year everyone! I have read of several doctors recommending 27g x 1/2" for testosterone injections into the thigh or delt. This is going to be shallow IM for me (fat calipers pinch about 8-10 mm at both locations). I currently use 25g x 1" into the thigh and the idea of less scar...

I am expirencing the symptoms of low B-12 this being worsened by having crohns so low absorbtion thru GI and even more so do to Prilosec usage too. My thought is to add injectable B-12 to my daily regime. Anyone know a good sight to buy it from and what would be a good dosage frequency/amount?