Apigenin for NAD+ — How It Supports Cellular Health
Apigenin inhibits CD38, an enzyme that breaks down NAD+ — the coenzyme essential for cellular energy and healthy ageing. Here is how the mechanism works, how strong the evidence is, and why it complements NMN in a longevity stack.
At a glance
- Mechanism: Apigenin inhibits CD38, an enzyme that degrades NAD+
- Effect: Preserves existing NAD+ levels (reduces breakdown, not increases production)
- Complementary to: NMN and NR (which increase NAD+ production)
- Evidence level: Strong in vitro and animal data; human clinical trials pending
- Dual benefit: Same compound supports sleep (GABA-A) and NAD+ (CD38 inhibition)
What is NAD+ and why does it matter?
Nicotinamide adenine dinucleotide (NAD+) is a coenzyme present in every cell of the body. It is essential for energy production, DNA repair, gene expression regulation, and cellular signalling. NAD+ levels decline significantly with age — by some estimates, dropping by 50% between the ages of 40 and 60.
This decline is associated with reduced cellular energy, impaired DNA repair capacity, increased inflammation, and accelerated ageing at the cellular level. Maintaining NAD+ levels is one of the central strategies in longevity science, alongside caloric restriction, exercise, and other interventions.
How apigenin supports NAD+ through CD38 inhibition
CD38 is an enzyme that becomes more active with age and is one of the primary consumers of NAD+ in the body. As CD38 activity increases, it breaks down NAD+ faster than the body can replenish it — creating a progressive deficit.
Apigenin is a potent CD38 inhibitor. In laboratory studies, it has been shown to significantly reduce CD38 enzymatic activity, thereby preserving NAD+ levels. A 2020 study published in Cell Metabolism identified CD38 as a major driver of age-related NAD+ decline and demonstrated that CD38 inhibition could restore NAD+ levels in aged tissue.
This mechanism is distinct from NAD+ precursors like NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside), which work by providing the building blocks for NAD+ synthesis. Apigenin works on the other side of the equation: reducing NAD+ degradation rather than increasing production.
Apigenin + NMN: the dual approach
The most comprehensive NAD+ strategy addresses both supply and demand:
Supply (NMN/NR): Provides precursor molecules that the body converts into NAD+ through the salvage pathway. This increases the rate of NAD+ production.
Demand (Apigenin): Reduces CD38-mediated NAD+ degradation. This preserves the NAD+ that the body produces, extending its functional availability.
Together, these create a more favourable NAD+ balance than either approach alone. Some longevity researchers describe this as "filling the bath while also plugging the drain."
Evidence status — honest assessment
The CD38 inhibition mechanism is well-established in laboratory and animal research. What is still developing is the clinical evidence in humans — specifically, whether 50mg of supplemental apigenin produces meaningful CD38 inhibition at the tissue level in living humans.
The pharmacokinetics of oral apigenin — how much reaches systemic circulation and at what concentration — are still being characterised. Bioavailability of flavonoids generally is a known challenge, though the concentrated supplement form likely achieves higher tissue levels than dietary sources.
For buyers, the practical implication: if you are already taking apigenin for sleep support, the CD38 inhibition is a plausible bonus benefit. If your primary goal is NAD+ support, apigenin should be considered as one component of a broader strategy (including NMN, exercise, and caloric awareness) rather than a standalone solution.
Choosing an apigenin supplement for NAD+ support
The same quality criteria apply for NAD+ as for sleep: verified purity, clean formulation, and reliable manufacturing. Futuro Labs Apigenin delivers 50mg at 98% verified purity — the same dose that supports sleep while potentially contributing to CD38 inhibition.
Futuro Labs Apigenin 50mg
£19.99 for 90 days · ~22p per day
Pros
- 50mg research-backed dose per capsule
- 98% verified purity — full lab tests published
- Zero fillers — only brown rice flour as flow agent
- BRC AA certified UK manufacture
- Clear vegan HPMC capsule, 23mm, easy to swallow
- 90-day supply, Amazon's Choice badge
Cons
- 90 capsules vs Time Health's 120 (higher per-cap cost)
- Newer brand with fewer reviews than heritage competitors
Available from: Amazon UK
Frequently asked questions
How does apigenin boost NAD+?
Apigenin inhibits CD38, an enzyme that consumes NAD+. By reducing CD38 activity, apigenin helps preserve existing NAD+ levels rather than directly producing new NAD+. This is complementary to NAD+ precursors like NMN and NR, which increase NAD+ production.
Is apigenin better than NMN for NAD+?
They work through different mechanisms and are complementary. NMN provides raw material for NAD+ production (supply side). Apigenin reduces NAD+ degradation by inhibiting CD38 (demand side). Using both addresses NAD+ from both directions.
What dose of apigenin for NAD+ support?
The optimal dose for CD38 inhibition in humans has not been established in clinical trials. The 50mg dose used for sleep support may provide some CD38 inhibition benefit, but the dose-response relationship for this specific mechanism is not yet well-characterised.
Does apigenin replace other longevity supplements?
No. Apigenin addresses one specific mechanism (CD38 inhibition) within a complex longevity picture. It complements rather than replaces NMN, resveratrol, or other longevity compounds.
Looking for a clean, lab-tested apigenin supplement?
Futuro Labs Apigenin delivers 50mg of 98% pure apigenin — BRC AA UK manufactured, zero fillers, ~22p per day.
Shop on Amazon UKLast updated: 25 May 2026. All content is provided for general information only and is not intended to substitute for professional medical advice. If you have any health concerns, consult your GP or a qualified healthcare professional. Futuro Labs is a registered UK supplement manufacturer (Futuro Lab Supplements Ltd, 71-75 Shelton Street, London WC2H 9JQ). Affiliate links to Amazon UK are clearly disclosed.