might need to use a lot of PBS Delivering this in a nasal spray would require solid pH control and some carrier to make it sticky or it would just run out
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For menopausal hair loss specifically, copper peptides address the accelerated aging and inflammation that accompany hormone decline
If you want a deeper breakdown of the science, Cymbiotika also explains glutathione in What Is Glutathione Good For Skin
Resources (e.g., nutrients, energy, antioxidants) are limited, thus allocation of a key resource to one trait, such as resistance against viral infection, means that less can be allocated to other functions that might be important in terms of Darwinian fitness (e.g., fertility)
Traditional approaches to weight loss work against male physiology after a certain point