While the evidence is not robust, and safety has not been proven, many athletes are willing to experiment with NAC supplements
SZ: Formal Analysis, Investigation, Resources, Software, Validation, Visualization, Writingreview and editing
Improved Metabolism: B12 injections support the bodys metabolic processes, aiding in the breakdown of fats and proteins for energy

Benefits Improves the appearance of thinning hair** Invigorating peppermint and tea tree scent Water-based, non-greasy formula Removes product & oil buildup Nourishes and hydrates the scalp Made without parabens, sulfates, alcohols and synthetic fragrance Key Ingredients Copper Tripeptide-1: Known to facilitate a clean and hydrated scalp barrier Caffeine: Supports thicker, healthier-looking hair Tea Tree Oil: Known to reduce and prevent excess oil buildup on the scalp and in the hair follicle Amino Acids: Supports hair strength, fights frizz and reduces the effects of breakage Hyaluronic Acid: Nourishes and hydrates the scalp for a clean, healthy hair environment Research Results 90% noticed an improvement in the look of fullness of their hair** 87% noticed an increase in how dense their hair looked** 82% noticed their scalp felt less dry** **In an independent study over 6 weeks of daily use

But there is still little clinical research in dogs, and the use in a veterinary practice is still regarded as an investigational/off-label use
Only during pregnancy do prolactin levels rise in response to prolactin-releasing hormone (PRH) from the hypothalamus