This calculator gives you a realistic, science-backed estimate of how much your NAD+ levels have declined based on your age.

📉 NAD⁺ Declines With Age — Here’s the Science

As we age, our NAD⁺ levels steadily decline. NAD⁺ is a molecule your cells rely on for energy, repair, and healthy metabolism. Scientific research shows:

• At age 20: NAD⁺ is at peak levels.
• By age 40: it can drop by up to 40–50%.
• By age 60–80: levels may fall to 20% or less.

This calculator uses the following research-based decay formula:

NAD⁺ % = 100 × (0.5)^((Age – 20) / 40)

✅ This reflects tissue-level NAD⁺ loss over time
✅ Sourced from peer-reviewed studies (Massudi et al., PLOS ONE 2012; Gomes et al., Cell 2013)

💊 Calculating Your NMN Needs

We assume a baseline NMN dose of 300 mg/day is suitable at age 20 to maintain optimal NAD⁺.

To compensate for age-related decline, the calculator increases your NMN dose proportionally using this formula:

NMN Dose = 300 × (100 / NAD⁺ %)

✔️ Automatically capped at 1,200 mg/day for safety
✔️ Based on real-world usage and longevity clinics

🌿 Why Piperine Matters

Piperine (found in black pepper) is a natural compound that enhances absorption in the gut. It works by:

• Slowing down enzyme breakdown of NMN
• Increasing permeability in the intestinal wall

If you’re taking Piperine, the calculator reduces your NMN dose by ~15%, assuming better uptake.

🧠 Note

This tool is meant for informational and educational purposes only. Always consult your health practitioner before beginning any new supplement protocol.