NMN supplementation and blood pressure: science confirms a decrease, but much less than hoped

NMN (Nicotinamide Mononucleotide) is one of the most popular supplements in the anti-aging community. David Sinclair claims he takes it daily. The market is worth billions of dollars. But a new meta-analysis published in Nutrients tests the specific effect of NMN on blood pressure, and offers a much less glamorous picture than the marketing presents: NMN does lower blood pressure, but much less than we hoped.

What was in the study?

The researchers gathered all the clinical trials that examined NMN and blood pressure, and analyzed them together (meta-analysis). The group included:

• Healthy people
• People with slightly high blood pressure (pre-hypertension)
• The experiments lasted from 4 to 12 weeks
• Doses ranged from 250 mg to 2 grams per day

Important limitations

The researchers highlighted some limitations in the design of the experiments:

• Short term. Most trials lasted only 4-12 weeks. There were no long-term studies
• Limited population. Most of them participated healthy or with a slight weight gain. There are no data on patients with moderate or severe hypertension
• Different dosages. The analysis was reduced because there was no uniformity in the doses

The finding: a real decrease, but small

NMN really lowered blood pressure, but at a relatively modest rate. To provide context, the researchers compared the results to established strategies:

1. DASH diet (Dietary Approaches to Stop Hypertension): lowered the upper pressure (systolic) significantly more than NMN
2. Regular aerobic activity: Dozens of clinical studies show a clear drop in blood pressure, also greater than NMN
3. Salt reduction: standard studies show a significant drop in blood pressure from reducing salt intake

In other words: NMN did not fail. It is simply less effective than simpler and cheaper measures.

Why does it matter?

The market for NMN and NAD+ supplements is estimated at $1.5 billion in 2026. Many of the buyers expect dramatic results, hoping to replace blood pressure medication, or to significantly extend life. This study balances expectations:

• If treated for blood pressure, NMN will not replace approved drugs
• If healthy, the effect on the numbers is negligible
• This money might be better spent organizing a personal fitness program or meeting with a nutritionist

What can you get from NMN?

Important to note: this study only looked at blood pressure. NMN has other effects being studied, some more promising:

• Fibromyalgia and Fatigue: Some Studies Show Improved Energy
• Mitochondrial function: There may be an improvement at the cellular level
• Hearing Loss by Age: Early Trials Show Potential
• Collagen synthesis in the skin: relatively known effect

But for those who take NMN specifically for blood pressure, the result is clear: You will get more than 30 minutes of walking a day + a diet low in salt.

The bottom line

NMN is not a "magic weapon" for blood pressure. If you want to measurably lower blood pressure, invest first in DASH, exercise, and salt reduction. If you're taking NMN anyway (for healthy aging, energy, or other reasons), getting a mild blood pressure lowering effect is a nice bonus, but not the main reason to continue with the supplement.