Quick Comparison
| Ginkgo Biloba | NMN (Nicotinamide Mononucleotide) | |
|---|---|---|
| Half-Life | 3-10 hours (varies by constituent) | 2-3 minutes in blood (rapidly converted to NAD+). NAD+ half-life: 1-2 hours in tissue |
| Typical Dosage | Standard: 120-240 mg daily of standardized extract (24% flavone glycosides, 6% terpene lactones). EGb 761 is the most studied form. Often taken in 2-3 divided doses. | Standard: 250-1000 mg daily. Sublingual may improve bioavailability by bypassing first-pass metabolism. Take in the morning — NAD+ follows circadian rhythm and morning supplementation aligns with natural peaks. Effects build over weeks. |
| Administration | Oral (capsules, tablets, liquid extract). Standardized extract recommended over raw leaves. | Oral (capsules, powder, sublingual). Sublingual may improve bioavailability. Store in cool, dry place. |
| Research Papers | 9 papers | 10 papers |
| Categories |
Mechanism of Action
Ginkgo Biloba
Ginkgo biloba extract (EGb 761) contains flavonoids (quercetin, kaempferol, isorhamnetin) and terpenoids (ginkgolides A, B, C, J and bilobalide). The flavonoids are potent antioxidants that scavenge superoxide, hydroxyl radicals, and peroxynitrite, and protect neurons from oxidative damage; they may also chelate iron. The terpenoids (ginkgolides and bilobalide) improve blood flow by antagonizing platelet-activating factor (PAF) at the PAF receptor, which reduces platelet aggregation, blood viscosity, and improves microcirculation in the brain. Bilobalide protects mitochondria and reduces apoptosis. Ginkgo modulates nitric oxide (NO) availability via endothelial nitric oxide synthase (eNOS) for vasodilation. It inhibits monoamine oxidase A and B (MAO-A, MAO-B), mildly elevating dopamine and serotonin. It may enhance cholinergic transmission and reduce amyloid aggregation.
NMN (Nicotinamide Mononucleotide)
NMN is transported into cells via the Slc12a8 transporter (highly expressed in the small intestine and brain) and converted to NAD+ by nicotinamide mononucleotide adenylyltransferases (NMNAT1 in the nucleus, NMNAT2 in axons/Golgi, NMNAT3 in mitochondria). Elevated NAD+ activates the sirtuin family of NAD+-dependent protein deacetylases: SIRT1 deacetylates PGC-1alpha to promote mitochondrial biogenesis, SIRT3 activates superoxide dismutase 2 (SOD2) and isocitrate dehydrogenase 2 (IDH2) for mitochondrial antioxidant defense, and SIRT6 promotes base excision repair of oxidative DNA damage. NAD+ is also consumed by poly(ADP-ribose) polymerases (PARP1/2) during DNA repair — age-related NAD+ depletion impairs PARP function, allowing DNA damage accumulation. In neurons, NAD+ is required for glycolysis (GAPDH cofactor), the TCA cycle, and Complex I of the electron transport chain, directly fueling the enormous ATP demands of synaptic transmission. NAD+ decline with aging (approximately 50% reduction between ages 40-60) reduces all of these processes simultaneously, creating a cascade of mitochondrial dysfunction, impaired DNA repair, and neuroinflammation that NMN supplementation aims to reverse.
Risks & Safety
Ginkgo Biloba
Common
Headache, dizziness, gastrointestinal discomfort, allergic skin reactions.
Serious
Increased bleeding risk — do not combine with blood thinners (warfarin, aspirin) or take before surgery.
Rare
Seizures (particularly with raw seeds, not standardized extract), severe allergic reactions.
NMN (Nicotinamide Mononucleotide)
Common
Mild flushing, nausea, headache initially.
Serious
Long-term human safety data still limited (first human trials completed 2020-2023). Theoretical concern about promoting cancer growth in existing tumors (NAD+ fuels fast-growing cells).
Rare
Insomnia if taken late.
Full Profiles
Ginkgo Biloba →
One of the oldest living tree species on Earth, used in traditional Chinese medicine for millennia. Ginkgo extract (EGb 761) is one of the most prescribed herbal medicines in Europe for cognitive decline and cerebrovascular insufficiency. It improves cerebral blood flow, has antioxidant properties, and modulates neurotransmitter systems. Most effective in older adults with declining cognitive function.
NMN (Nicotinamide Mononucleotide) →
A direct precursor to NAD+ (nicotinamide adenine dinucleotide), a coenzyme essential for cellular energy production, DNA repair, and sirtuin activation. NAD+ levels decline 50% between ages 40 and 60, contributing to age-related cognitive decline and neurodegeneration. NMN supplementation restores NAD+ levels and improves mitochondrial function, memory, and neuroplasticity in animal models.