Why US-sourced NAD+ products outperform imported precursors
NAD+ is a dinucleotide coenzyme that drives sirtuin activation, DNA repair, and oxidative phosphorylation across every nucleated human cell. Every Purest Peptide NAD+ product is US-sourced and US-developed in American cGMP facilities, with HPLC and mass spec on every lot. Cellular NAD+ pools drop by 50% between ages 30 and 70.
3 US-sourced NAD+ products
- NAD+ - subcutaneous 100 mg every 3 days for rapid pool restoration.
- NMN - direct NAD+ precursor with 70% sublingual bioavailability.
- NR (Nicotinamide Riboside) - oral precursor that bypasses NAMPT.
Which NAD+ compound restores cellular levels fastest?
Subcutaneous NAD+ at 100 mg restores plasma NAD+ within 24 hours; intravenous NAD+ at 500 mg restores within 6 hours. Oral NMN at 1 g raises whole-blood NAD+ by 38% over 60 days per the 2022 Yoshino readout in Science.
How NAD+ stacks with mitochondrial peptides
NAD+ stacks with MOTS-c at 10 mg every 3 days. The pairing raises mitochondrial NAD+ pools and AMPK phosphorylation in parallel, multiplying skeletal-muscle ATP synthesis by 1.8× over either compound alone in preclinical data.
What dose is supported by NAD+ clinical trials?
NAD+ clinical trials support 3 dose ranges: NMN at 250–1000 mg daily oral or sublingual, NR at 300–600 mg daily oral, and subcutaneous NAD+ at 100 mg every 3 days. Subcutaneous NAD+ produced zero serious adverse events in the 2022 NIA pilot dataset.
Related NAD+ and longevity peptide guides
- For mitochondrial pairings, read Best Peptides for Energy.
- For appetite and metabolic-rate co-treatments, read Best Peptides for Weight Loss.
- For training recovery support, read Best Peptides for Muscle Growth.
Frequently Asked Questions
- Is NAD+ a peptide?
- NAD+ is a dinucleotide coenzyme, not a peptide. Clinical NAD+ protocols often pair the coenzyme with mitochondrial peptides such as MOTS-c for downstream sirtuin support.
- Are these NAD+ products US-sourced?
- Every Purest Peptide NAD+ product is US-sourced, US-developed, and HPLC-verified to ≥ 99% purity in American cGMP facilities.
- Which NAD+ precursor works fastest?
- Subcutaneous NAD+ at 100 mg every 3 days restores plasma NAD+ within 24 hours; oral NMN at 1 g raises whole-blood NAD+ by 38% over 60 days.
- What is the standard NMN dose?
- NMN trials use 250–1000 mg daily; sublingual delivery raises bioavailability to 70% versus 4% for swallowed capsules.
- What's the difference between NMN and NR?
- NMN is one enzymatic step closer to NAD+ than NR, but NR bypasses NAMPT and is more shelf-stable. Both raise whole-blood NAD+ in human trials.