Those are different jobs
Lasting tiredness can have many causes beyond B12, such as iron levels, thyroid issues, or sleep problems, and a check-in helps make sure you are treating the right thing
However, the dye is chemically fragile and prone to form non-fluorescent aggregates in biological media
Bone Marrow Transplant 15:757762 [PubMed] [Google Scholar] Durmaz L, Ertrk A, Akyz M, Polat Kse L, Uc EM, Bingl Z, Salamta R, Alwasel S, Gulin (2022a) Screening of carbonic anhydrase, acetylcholinesterase, butyrylcholinesterase, and -glycosidase enzyme inhibition effects and antioxidant activity of coumestrol
A 12-week senior fitness program led to improvements in both strength and cognition, alongside elevated serum BDNF (27)
Jarrett, S