The hormone is mainly secreted into the bloodstream at night [22], affecting both peripheral organs and the central nervous system (CNS) due to its amphiphilic properties [24]
Nitrate-Reducing Oral Bacteria: Linking Oral and Systemic Health
Its research profile covers collagen synthesis stimulation (up to 70% increases in dermal fibroblasts at optimal concentrations), wound healing acceleration, anti-inflammatory gene regulation, skin regeneration, hair follicle support, and modulation of over 4,000 genes involved in tissue maintenance and repair
So, if your doctor told you to expect a pink color, you are good to go
An important concept to define prior to synthesis of literature is progressive RT
Melatonin and the skeleton [PMID: 23716040] Laboratory literature summary: Melatonin and the skeleton