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Restore energy and mental clarity with a powerful combination designed to support cellular function and overall vitality. NAD⁺ & B12 helps promote energy production, cognitive performance, and healthy metabolism while supporting focus and daily wellness. Experience sustained energy, improved mental sharpness, and enhanced overall well-being.
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Physician reviewed before fulfillment · Ships 2-Day Air · Free shipping over $150
What to Expect
Week 1 – 2
Starting at 0.25mL once weekly — a noticeable energy lift within hours of the first injection as NAD+ restores ATP production. B12 begins supporting neurological function and neurotransmitter balance. Many users report improved mental clarity and reduced fatigue within the first two doses.
Week 3 – 4
Titrate to 0.5mL weekly or twice weekly as tolerated. Cognitive clarity, mood stability, and physical stamina improve meaningfully. Mitochondrial function restores as NAD+ levels normalize. B12-driven nerve repair and myelin support begin producing sustained neurological improvements.
Month 2+
Sustained cellular energy, long-term DNA repair support, and neuroprotection accumulate. Sirtuin activation and NAD+-driven longevity pathways compound over time. Consistent injection timing and site rotation maintains optimal plasma levels and sustained effectiveness.
* Individual results may vary. These statements have not been evaluated by the FDA.
What It Does
A powerful dual-compound injection — NAD+ restores cellular energy and DNA repair, while Vitamin B12 supports neurological function and nerve health. Delivered subcutaneously for maximum bioavailability.
NAD+ — Cellular Energy & Longevity
Powers the electron transport chain for ATP synthesis, activates sirtuins for DNA repair and longevity, supports every energy-demanding cellular process. Declines up to 50% by midlife.
Vitamin B12 — Neurology & Nerve Health
Supports neurotransmitter synthesis, myelin sheath integrity, red blood cell formation, and nerve repair. B12 deficiency drives fatigue, cognitive fog, and mood disruption — often undiagnosed.
NAD+ enhances ATP production — the energy currency powering every cell. Restoring NAD+ via injection translates directly into improved stamina, vitality, and resistance to physical and mental fatigue. B12 further supports this through red blood cell formation and oxygen transport to energy-demanding tissue.
NAD+ fuels the metabolic demands of neurons while B12 supports neurotransmitter synthesis and myelin sheath integrity — the protective coating around nerve fibers essential for fast, clear signal transmission. Together they improve focus, memory, and mental clarity through complementary neurological mechanisms.
NAD+ activates sirtuins and PARP enzymes — the primary regulators of DNA repair and cellular aging. B12 supports DNA methylation pathways essential for gene expression regulation. Together they address aging at the cellular level through two complementary and mutually reinforcing longevity pathways.
Combats chronic fatigue and enhances recovery from both physical exertion and mental stress. NAD+ restores mitochondrial efficiency while B12 addresses fatigue rooted in neurological depletion or B12 deficiency — making this combination effective across a broader range of fatigue causes than NAD+ alone.
Vitamin B12 is essential for neurological function — supporting nerve repair, myelin production, and neurotransmitter balance. B12 deficiency presents as fatigue, cognitive fog, and mood disruption and is more common than most people realize. This injection addresses that directly with maximum bioavailability via subcutaneous delivery.
Optimizes glucose metabolism, mitochondrial function, and overall energy efficiency. NAD+ supports the core metabolic enzymes involved in energy conversion, while B12 plays a critical role in fatty acid and amino acid metabolism — together improving how efficiently your body processes and uses nutrients at the cellular level.
Both NAD+ and B12 demonstrate neuroprotective properties — reducing oxidative stress, supporting long-term brain health, and helping defend neurons against age-related decline and environmental stressors. Their combined action provides broader neuroprotection than either compound individually.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
The Science
Unlike oral supplements that lose potency through digestion, this subcutaneous injection delivers NAD+ and B12 directly into the bloodstream — producing faster onset and significantly higher bioavailability than any oral alternative.
Begin with 0.25mL (dial to 25) once weekly. After 2 to 4 weeks, titrate up to 0.5mL (dial to 50) once or twice weekly as tolerated. Lower daily doses are also an option as directed by your physician. Rotate injection sites weekly between the abdomen, upper thigh, and glutes for consistent absorption. Both NAD+ and B12 bypass the digestive system entirely — entering the bloodstream for full bioavailability within minutes.
Once in circulation, NAD+ is taken up by cells and enters the mitochondria — where it powers the electron transport chain for ATP synthesis. Simultaneously, elevated intracellular NAD+ activates sirtuin enzymes (SIRT1–7) and PARP enzymes that regulate DNA repair, chromatin remodeling, and metabolic efficiency. NAD+ also supports the conversion of nutrients into energy through its role as a critical coenzyme in glycolysis, the TCA cycle, and beta-oxidation.
B12 is a cofactor for methionine synthase and methylmalonyl-CoA mutase — enzymes critical for myelin synthesis and fatty acid metabolism in neural tissue. Adequate B12 maintains the myelin sheath that protects nerve fibers and enables fast signal transmission. It supports neurotransmitter synthesis including serotonin and dopamine, drives red blood cell formation for oxygen delivery, and participates in DNA methylation pathways that regulate gene expression in neurological tissue.
NAD+ and B12 are biochemically interdependent — NAD+ metabolism supports the methylation cycle that B12 drives, and B12's role in one-carbon metabolism feeds back into NAD+ biosynthetic pathways. With consistent weekly or twice-weekly injections, cellular NAD+ levels and B12 status both normalize toward optimal ranges — producing compounding improvements in energy, cognitive function, neurological health, and longevity signaling that accumulate over months of consistent use.
Why Lavi MD
Most peptide suppliers prioritize volume over patients. We were built differently — by a physician, for patients.
Physician on Staff
Sasson Moulavi, MD
Dispensing Physician · Chayim Therapeutics, LLC
West Palm Beach, FL
"Every product we offer is something I would prescribe to my own patients. Our formulations are designed for clinical outcomes — not marketing claims."
How We Operate
Built by a Physician, Not a Marketing Team
Lavi MD was founded under physician supervision. Every formulation, every dose, every protocol is reviewed by Dr. Moulavi before it reaches a patient — not outsourced to a contract manufacturer with no clinical input.
We Ship 2-Day Air, Monday & Tuesday Only
We only ship Monday and Tuesday, and every order placed in that window goes out 2-Day Air. That's a deliberate decision. It keeps your order moving quickly and arriving before the weekend, instead of sitting in a carrier facility for days. Most brands don't think that far ahead.
We Treat You Like a Patient, Not an Order Number
Our team includes clinical staff who understand what you're taking and why. If something goes wrong with your order — a warm shipment, a missing component, a question about your protocol — we fix it. No automated runaround.
We hold ourselves to the standards set by the bodies advancing peptide science, so you can have full confidence in every product you receive.
American Peptide Association
American Peptide Association
The leading industry body advancing the science, safety, and standards of peptide research. Our membership reflects our commitment to purity, transparency, and responsible sourcing.
Official Member
SSRP Institute
Seeds Scientific Research and Performance Institute
A physician led institute advancing the clinical standards of peptide therapy and cellular medicine. Our membership reflects our commitment to evidence based, physician guided care.
Official Member
