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A 2022 study in the journal Frontiers in Cell and Developmental Biology specifically looked at daily colostrum injections effects on hair regrowth in rats who had their fur partially shaved

It is highly stable, resistant to degradation in gastric fluid, and readily soluble in saline and aqueous solutions at physiological pH, enabling reproducible administration.70 Pharmacokinetic studies in rats and dogs have demonstrated systemic absorption and distribution across multiple tissues, with elimination primarily via urinary and biliary pathways, supporting its bioavailability and translational relevance.70 Pharmacodynamically, BPC 157 appears to exert pleiotropic cytoprotective effects rather than acting through a single pathway

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J Plant Growth Regul 38:199215