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Although not the primary focus, it could be an added benefit

Copper Delivery: Acts as a carrier peptide, delivering bioavailable copper to cells where it serves as a cofactor for numerous enzymes involved in tissue maintenance

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[5] A 2017 study also found that patients with pernicious anemia who received B12 injections showed complete reversal of symptoms in most cases , something oral tablets alone could rarely achieve

In summary: Sure, if you're getting adequate, digestible, bioavailable protein from food sources (at least 0.55-0.8 grams per pound of body weight, preferably) you might be able to get enough amino acids from your diet to simply maintain a relatively decent level of health unless youre as physically active as the average exercise enthusiast or athlete, vegan or vegetarian, over 50 years old, have even the slightest amount of gut dysbiosis, or actually want to build muscle and look and feel amazing

They often have special nutritional needs or challenges