There are substitutes in the form of oral supplementation, however physicians generally resort to this classic treatment
There was a big push in this era for like finding animal tissues and putting them into humans
Comprehensive analysis of PPAR-dependent regulation of hepatic lipid metabolism by expression profiling
A practical daily stack for hair protection includes a high-quality multivitamin as a baseline, plus additional iron (if ferritin is below 50 ng/mL, under medical supervision), zinc at 15-30 mg with 1-2 mg copper, vitamin D3 at 2,000-5,000 IU depending on baseline levels, biotin at 2,500-5,000 mcg (remembering the thyroid lab caveat), and a B-complex covering B12 and folate
Related condition pages include Vitamin B12 Deficiency, Pernicious Anemia, and Megaloblastic Anemia