You can think of proteins as a full-length necklace, while peptides are like short strands of that same chain
If you're an athlete worried about WADA, both are prohibited either way
Only licensed and registered nurses will administer B12 injections for your peace of mind
Your body enlists redox in many biochemical reactions
It should not be expected to reverse severe osteoarthritis, regrow advanced cartilage loss, correct major joint deformity, heal a complete tendon rupture without appropriate orthopedic management, or replace surgery when surgery is clearly indicated
Research comparing routes of administration is ongoing and findings are mixed, so the practical difference for any individual patient is a question for their prescribing provider