Quick Comparison
| Ginkgo Biloba | Holy Basil (Tulsi) | |
|---|---|---|
| Half-Life | 3-10 hours (varies by constituent) | 2-5 hours (eugenol and other active compounds) |
| 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: 300-600 mg extract daily, or 2-3 cups of tulsi tea. Standardized extracts (2.5% ursolic acid) provide more consistent dosing. Can be taken morning or evening. |
| Administration | Oral (capsules, tablets, liquid extract). Standardized extract recommended over raw leaves. | Oral (capsules, tea, tincture). Tea form is traditional and pleasant. Extract for standardized dosing. |
| 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.
Holy Basil (Tulsi)
Holy basil's adaptogenic effects come from multiple compounds: eugenol (anti-inflammatory via COX-2 and 5-LOX inhibition, TRPV1 modulation), ursolic acid (cortisol modulation via 11beta-HSD inhibition and glucocorticoid receptor modulation), rosmarinic acid (antioxidant via Nrf2/ARE pathway, anti-allergic via mast cell stabilization), and ocimumosides A and B (anti-stress via CRH and corticosterone reduction). It modulates the HPA axis, normalizing cortisol and corticosterone levels through hypothalamic and adrenal effects. Ursolic acid inhibits acetylcholinesterase (AChE), mildly increasing synaptic acetylcholine. Eugenol provides direct anxiolytic effects through GABA-A receptor positive allosteric modulation (possibly at the beta2/3 subunit interface) and 5-HT1A partial agonism. Ocimumosides may reduce ACTH release from the pituitary.
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.
Holy Basil (Tulsi)
Common
Very well-tolerated. Mild blood sugar lowering.
Serious
May have anti-fertility effects — caution if trying to conceive. May interact with blood thinners.
Rare
Allergic reaction.
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.
Holy Basil (Tulsi) →
An Ayurvedic adaptogen (Ocimum tenuiflorum) revered as 'The Incomparable One' in traditional Indian medicine. Holy basil reduces cortisol, supports clear thinking under stress, and has mild anxiolytic effects. It is gentler than ashwagandha and rhodiola, making it suitable for people who find stronger adaptogens overstimulating or sedating. Often consumed as a pleasant-tasting tea.