Complement, Don't Compete:
These serums do not compete with your high-margin services; they enhance them. They are premium, specialized products that justify a high price point and reinforce the clinical nature of your spa.
Staff Recommendation, Not Selling:
Give your staff the language to make these products part of the post-treatment protocol (e.g., "Take this NAD+ serum daily to accelerate your cellular repair following your treatment").
Actionable Menu Suggestion:
Create a "Post-Procedure Protocol" bundle that includes NAD+, Collagen, and Colostrum, ensuring a high-value recurring retail purchase after every major service.