Its released more slowly
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Novel methylcobalamin nasal spray versus intramuscular injection: A randomized, crossover comparative bioavailability study Int J Endocrinol Metab Disord

BPC-157/TB-500/GHK-Cu 10+10+50mg (GLOW blend 70mg) $200.00 Volume discounts Auto-applied at checkout Free shipping on orders of $200+ Compound Identity COMPOUND NAME BPC+TB500+GHK-Cu SYNONYMS GLOW blend CAS NUMBER 137525-51-0 (BPC-157), 77591-33-4 (TB500), 300801-03-0 (GHK-Cu) MOLECULAR FORMULA C 62 H 98 N 16 O 22 (BPC-157), C 212 H 350 N 56 O 78 S (TB500), C 28 H 46 CuN 12 O 8 (GHK-Cu) MOLECULAR WEIGHT ~6786.95 g/mol STRUCTURE Multi-peptide blend PEPTIDE SEQUENCE Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val (BPC-157), Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (TB500), Gly-His-Lys (GHK-Cu) CHEMICAL STRUCTURE Molecular Formula : C 62 H 98 N 16 O 22 (BPC-157), C 212 H 350 N 56 O 78 S (TB500), C 28 H 46 CuN 12 O 8 (GHK-Cu) Source: PubChem Mechanism of Action GLOW blend works through multiple complementary biological pathways that promote tissue repair, regeneration, and inflammation control

Although this sounds like a medicine, you might be surprised to find that it is neither an ingredient for treating diseases nor can it be injected alone
Since the body cannot produce vitamin B12 itself, it is dependent on absorption through food