Most people view their morning coffee as a simple tool to wake up the brain, but I want you to start thinking about hematologic oxygenation gains as the real foundation of lasting energy. We have all been there. You drink a cup of high-octane coffee, feel a surge of jitters for sixty minutes, and then come crashing down before lunch. This happens because caffeine is a stimulant that borrows energy from your future self. It does nothing to improve the actual efficiency of your blood or the way your body carries its most vital fuel: oxygen. To move beyond the jittery cycle, we have to look at how molecules like NAD+ interact with our biology to create systemic performance.
I have spent years watching patients struggle with fatigue that no amount of rest or espresso seems to fix. Often, the issue isn’t a lack of sleep, but a lack of metabolic efficiency. When we talk about hematologic oxygenation gains, we are talking about the ability of your red blood cells to pick up oxygen in the lungs and deliver it effectively to your brain and muscles. Without this efficiency, your cells are essentially gasping for air while you are trying to power through a spreadsheet or a workout.
The Science of 2025: NAD+ and Blood Health
In 2025, a landmark post-hoc analysis published in GeroScience provided us with a much clearer picture of how NAD+ impacts our hematologic profile. Researchers analyzed data regarding NAD+ precursors and found a significant link between these molecules and key blood markers including hemoglobin levels and red blood cell (RBC) counts. For a long time, we viewed NAD+ primarily through the lens of mitochondrial health and DNA repair. While those are essential, this newer data suggests that NAD+ plays a frontline role in maintaining the very cells that keep us oxygenated.
When we look at the data, the concept of hematologic oxygenation gains becomes more than just a theory. The study indicated that maintaining higher levels of NAD+ supports the structural integrity of red blood cells. As we age, our RBCs can become less flexible and less efficient at navigating the tiny capillaries in our bodies. By supporting these cells at the precursor level, we are essentially giving the body the tools it needs to maintain a robust “delivery fleet” for oxygen.
Minimalist line art of a red blood cell and a spark of energy, soft colors.
Measuring Hematologic Oxygenation Gains Through Science
To understand why this matters for your daily life, you have to understand the role of hemoglobin. Hemoglobin is the protein in your red blood cells that actually binds to oxygen. If your hemoglobin is low, or if your red blood cells are not functioning at their peak, your oxygen-carrying capacity drops. This is why even a healthy person can feel sluggish if their hematologic health is suboptimal.
- Supplementing with NAD+ precursors supports the health of red blood cell membranes.
- Higher NAD+ levels correlate with improved hemoglobin concentrations in aging adults.
- Efficient oxygen transport reduces the strain on the cardiovascular system during exercise.
- Optimal blood health prevents the cognitive fog often associated with mid-afternoon energy crashes.
- Supporting the bone marrow environment helps ensure the production of high-quality red blood cells.
Related reading: The UpCup Transparency Report
This systemic performance is the reason I am so vocal about looking at the “why” behind our supplements. If you can improve your internal oxygen delivery, you don’t need to rely on external stimulants as heavily. You are building a more resilient engine rather than just pressing the gas pedal harder on a car with a clogged fuel line. This is the hallmark of evidence-based health insights.
Cognitive Endurance and Oxygen Flow
The brain is an oxygen-hungry organ. It accounts for only about two percent of your body weight but consumes roughly twenty percent of your oxygen supply. This is why the first sign of poor oxygenation is often a lack of focus, “brain fog,” or an inability to stay on task. This is where hematologic oxygenation gains translate directly into professional and personal productivity. When your blood is highly efficient at carrying oxygen, your brain can maintain high-level cognitive function for longer periods.
This is different from the “focus” you get from a heavy dose of caffeine. Caffeine blocks adenosine receptors, which keeps you from feeling tired. However, it doesn’t actually provide the brain with more of what it needs to perform work. By contrast, supporting your hematologic health ensures that the neurons have the oxygen required for aerobic metabolism. This leads to what I call cognitive endurance: the ability to stay sharp from your first meeting until you close your laptop for the night.
Why We Included NAD+ in UpCup
When we were developing the formula for UpCup, my fellow founders and I had a specific goal. We wanted to create a morning ritual that felt good in the moment but also supported long-term health. We didn’t want to just make another coffee; we wanted a functional beverage that addressed the cellular declines we see with age. Including NAD+ was a deliberate decision based on the emerging evidence regarding its role in systemic performance and cellular repair.
By supporting your blood at the cellular level, you realize hematologic oxygenation gains that no amount of pure caffeine can match. We see this as part of a larger philosophy of “bioavailability.” It isn’t just about what you put in your body; it’s about what your body can actually use to improve its state. In our morning ritual, the coffee provides the immediate ritual and a gentle lift, while the NAD+ and other functional ingredients like Lion’s Mane and Shilajit work on the underlying machinery.
Related reading: The Science of the Morning Ritual
Long-Term Benefits of Blood Efficiency
The benefits of improved oxygenation extend far beyond just feeling “awake.” Over time, better oxygen delivery supports tissue repair, immune function, and cardiovascular health. When your heart doesn’t have to work as hard to push oxygen-rich blood to your extremities, you reduce the overall stress on your vascular system. This is why we look at the 2025 GeroScience study with such interest. It confirms that we can influence these foundational markers of health through targeted nutrition and supplementation.
Invest in your blood health today, and you will see the results in how you feel ten years from now. I encourage everyone to look at their morning routine not just as a way to survive the next hour, but as an opportunity to prime their biology for the decades ahead. The science is moving fast, and staying informed about things like NAD+ and its effect on your oxygen-carrying capacity is the best way to stay ahead of the curve.
Common Questions About NAD+ and Blood
Does NAD+ increase my red blood cell count?
Research suggests that NAD+ precursors can support the maintenance of healthy red blood cell levels by improving the environment in which these cells are produced. This process helps ensure that your body has an adequate supply of cells to carry oxygen to your tissues.
How do hematologic oxygenation gains feel?
Most individuals report a sense of steady endurance rather than a sudden burst of energy. You might notice that you feel less winded during physical activity or that your focus remains sharp for several hours longer than usual without the need for additional stimulants.
Why did UpCup include NAD+ in the coffee?
We decided as a founder group to include NAD+ because it addresses the metabolic root of energy rather than just masking fatigue. It complements the natural caffeine in the coffee by providing the cellular support necessary for sustained performance.
Can I get enough NAD+ from my diet?
While small amounts of NAD+ precursors are found in foods like milk, fish, and green vegetables, it is often difficult to reach the levels used in clinical studies through diet alone. This is why many people choose to supplement with specific precursors or functional foods that are enriched with these molecules.
How long does it take to notice a difference in energy?
While some people feel a difference in their focus and endurance within a few days, the hematologic benefits typically accumulate over several weeks. It takes time for the body to support the production and maintenance of new red blood cells and to optimize cellular oxygenation.
For those interested in the technical details of the research mentioned, you can find the full 2025 analysis on the Springer Link portal at https://link.springer.com/article/10.1007/s11357-025-01968-0.
William McArthur, MD ( Evidence-Based Health Insights)