Side effects are rare and generally mild and include temporary warmth or minor bruising at the injection site
doi: 10.1210/jc.2011-1256
This is a known consideration in freeze-dried and frozen formulation research, where excipients such as mannitol are studied specifically to protect molecules through these phase changes, as covered in the Journal of Pharmaceutical Sciences review cited above
Modulation of mu opioid receptor desensitization in peripheral sensory neurons by phosphoinositide 3-kinase gamma
Concentrations in shampoo formulations generally range from 0.01% to 0.1%, lower than leave-on products but still sufficient to stimulate follicular activity when used consistently as part of a daily hair care routine
Pena DA, Gasser B, Zanghellini J, Steiger MG, Mattanovich D (2018) Metabolic engineering of Pichia pastoris