NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every cell of your body, central to how cells produce energy and repair themselves. Levels naturally decline with age, which is why NAD+ has become a focus of interest in healthy-aging medicine. A clinician-guided NAD+ program aims to help replenish it under medical oversight.
What NAD+ is
NAD+ is a coenzyme your cells rely on for the chemical reactions that turn food into usable energy and support cellular maintenance and repair. Because it participates in so many processes, it is often described as foundational to how cells function.
In a Harbor program, NAD+ is prescription-only, compounded by licensed U.S. pharmacies, and dispensed only after a board-certified physician reviews your intake.
Why NAD+ levels decline
NAD+ levels tend to fall gradually as people age, and this decline is one reason researchers and clinicians have taken interest in supporting NAD+ as part of a healthy-aging approach. The goal of a program is to support your levels under clinician guidance rather than to promise a specific outcome.
Who considers NAD+
NAD+ programs are built for adults seeking a medically guided approach to energy, recovery, and healthy aging. A physician reviews your goals and health history and decides whether treatment is appropriate. If it is not the right fit, it is not prescribed.
What to expect
A program begins with a brief online health questionnaire reviewed by a licensed physician. If appropriate, your medication ships to your door and is self-administered as a small subcutaneous injection at home, on a schedule your clinician sets.
A complete program includes ongoing clinician access and check-ins so your plan can be reviewed and adjusted over time.
Safety and side effects
The most common effects are mild injection-site reactions such as redness or soreness, and some people notice temporary nausea, headache, or fatigue as their body adjusts. A board-certified physician reviews your health history before prescribing, and a care team is available around the clock if anything feels off.
This article is for general education and is not medical advice. Sermorelin, NAD+, and glutathione are prescription-only and are dispensed only after a licensed clinician reviews your health history and decides the treatment is appropriate for you. Talk with a qualified clinician about your individual situation.