Dr. Jason Schuster explains that the CEREN (sirtuin) genes are a family of NAD⁺‑dependent regulators that help keep cells healthy. Elevating NAD⁺ levels through diet, lifestyle, and targeted supplements can turn these genes on, supporting metabolism, inflammation control, and overall healthspan.
What Are CEREN Genes?
CEREN genes are NAD⁺‑dependent histone deacetylases that influence many signaling pathways. Humans have seven primary CEREN genes—C1, C2, C3, C4, C5, C6, and C7—distributed across the nucleus, cytosol, and mitochondria, each helping maintain cellular homeostasis.
- Nuclear CEREN: C1, C6, C7 – regulate DNA homeostasis
- Cytosolic CEREN: C2 – modulates cell‑cycle depression
- Mitochondrial CEREN: C3, C4, C5 – support metabolic enzymes
How NAD⁺ Drives CEREN Activity
NAD⁺ is converted to NADH, providing the electron that mitochondria use to make ATP. When NAD⁺ is plentiful, CEREN proteins become active, promoting mitochondrial efficiency, reducing oxidative stress, and supporting anti‑inflammatory pathways. Low NAD⁺ leads to energy deficiency, mitochondrial dysfunction, and can contribute to autoimmunity, cancer, and other diseases.
Key Supplements to Activate CEREN Genes
Dr. Schuster highlights three supplement categories that most reliably boost CEREN activity: nicotinamide mononucleotide (NMN), nicotinamide riboside (NR), and specific mitochondrial peptides such as Epithin and M/C. NMN and NR directly raise cellular NAD⁺, primarily activating C1 and C6, while the peptides enhance mitochondrial ATP production and can modestly influence C3‑C5.
- NMN – nicotinamide mononucleotide, a NAD⁺ precursor
- NR – nicotinamide riboside, another NAD⁺ precursor
- Epithin – mitochondrial peptide with potent healing capacity
- M/C – mitochondrial peptide that improves ATP efficiency
Caloric Restriction & Hormesis
Beyond supplements, moderate caloric restriction mimics evolutionary periods of scarcity, creating a mild cellular stress that activates CEREN genes. This hormetic response improves mTOR and AMPK signaling, supporting the same pathways that NMN, NR, and peptides target.
- Practice modest caloric restriction (not chronic starvation)
- Pair with regular physical activity to reinforce mitochondrial health
- Prioritize nutrient‑dense whole foods to sustain NAD⁺ levels
What Remains Uncertain
The scientific community still lacks precise activators for the mitochondrial CEREN genes (C3‑C5) and definitive dosing guidelines for many of the peptide supplements. Dr. Schuster emphasizes that while the concepts are promising, the evidence base is still emerging, and individualized professional guidance is recommended.
- Specific mitochondrial CEREN activators are still under investigation
- Dosage recommendations for peptide therapies are not yet standardized
- Human data on long‑term effects remain limited
“If you just want one thing to remember, turning on the seven CEREN genes leads to health and homeostasis of cells.”— Dr. Jason Schuster
Dr. Schuster's short takes on this topic — tap to play.
The full nutrition coursework
Dr. Schuster's board-certified, accredited online nutrition courses — the research, the dosing, and the clinical reasoning in full.