NAD+ is one of the most important molecules in the human body — and one of the least talked about outside of scientific circles. As we age, its levels naturally decline, and that drop is directly linked to changes many of us chalk up to "just getting older": less energy, more fatigue, reduced focus, slower recovery. Understanding what NAD+ is and how to support its levels can change how you approach your long-term health.
What exactly is NAD+?
NAD+ stands for nicotinamide adenine dinucleotide. It's a coenzyme found in every living cell that serves two essential functions: converting nutrients into energy and activating the body's cellular repair mechanisms. Without enough NAD+, cells can't produce energy efficiently or repair accumulated damage over time.
The challenge is that NAD+ levels drop progressively with age — some studies suggest they can be cut in half between ages 40 and 60. That's not inevitable, but it is worth paying attention to.
NAD+ and cellular energy: fueling your mitochondria
Mitochondria are the energy powerhouses of your cells — and NAD+ is the fuel that keeps them running. Without adequate levels, energy production slows down, leading to fatigue, lower physical performance, and that persistent feeling of running on empty that many associate with aging.
Studies published on PubMed show that restoring NAD+ levels improves mitochondrial efficiency and increases energy production in aging muscle tissue. (Source: PubMed)
"As a cardiologist, I know that mitochondrial health is central to cardiovascular wellbeing. The heart is the highest energy-consuming muscle in the body — and it depends on NAD+ to function well." — Dr. Juan Rivera
NAD+ and DNA repair: protecting your cells from within
Every day, your cells' DNA is exposed to oxidative stress, environmental toxins, and natural wear. NAD+ activates key enzymes — sirtuins and PARPs — that detect and repair that damage, promoting healthier cellular aging.
Research published on PubMed shows that increasing NAD+ levels improves sirtuin activity, driving DNA repair and promoting cellular longevity. (Source: PubMed)
NAD+ and brain function: sharper focus, clearer thinking
The brain is one of the most energy-dependent organs in the body — and NAD+ plays a direct role in keeping neurons healthy and supporting cognitive performance, concentration, and mental clarity.
Studies published on PubMed show that adequate NAD+ levels support mitochondrial activity in brain cells and contribute to better cognitive function over time. (Source: PubMed)
NAD+ and metabolism: energy balance at the cellular level
NAD+ is an essential coenzyme in the metabolic reactions that convert food into usable energy. Healthy NAD+ levels activate pathways related to fat oxidation and energy regulation, supporting a more efficient metabolism. For more on supporting your energy metabolism, visit our blog.
How to support your NAD+ levels naturally
There are concrete habits that help maintain healthy NAD+ levels:
- Regular exercise — movement naturally stimulates NAD+ production
- Nutrient-rich diet — whole grains, lean proteins, and vegetables support cellular health
- Quality sleep — circadian rhythms directly regulate NAD+ levels; learn more about sleep quality and NAD+ levels
For more direct support, our NAD+ supplement combines NAD+, Vitamin B12, Guaraná, and Spermidine in a 4-in-1 formula designed to support cellular energy and healthy aging — helping you feel more alert and full of vitality.
NAD+ isn't just a trend — it's one of the most essential molecules for your energy, focus, and vitality as you age. Taking care of your levels today is an investment in how you'll feel tomorrow.
Let's get healthier, together.
The Santo Remedio team
