Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Holy Basil (Tulsi) | L-Theanine | |
|---|---|---|
| Category | Adaptogens | Amino Acids |
| Standard Dose | 500-1000mg daily (standardized extract) or 300mg of high-potency extract | 100-200mg daily (or as needed for acute anxiety/focus) |
| Timing | Morning and/or evening with meals. Tulsi tea form is also traditional. | Flexible: morning for calm focus (stack with caffeine), before stressful events, or evening for relaxation/sleep onset. Onset: 30-60 minutes oral, 15-20 min sublingual. |
| Cycle Duration | Cycle 8-12 weeks on, 2-4 weeks off, or ongoing at lower doses | ongoing or as needed |
| Evidence Level | moderate_human | strong_human |
Holy Basil (Ocimum tenuiflorum) contains eugenol, rosmarinic acid, ursolic acid, and ocimumosides. Eugenol inhibits COX-2 and 5-LOX, providing anti-inflammatory effects. Ursolic acid activates AMPK and inhibits NF-kB. Ocimumosides (A and B) exhibit anti-stress activity by normalizing corticotropin-releasing hormone (CRH) and cortisol levels. Holy Basil also inhibits cortisol synthesis at the adrenal level, modulates GABAergic and serotonergic neurotransmission, has adaptogenic effects via normalization of hypothalamic-pituitary-adrenal axis, and exhibits hypoglycemic action via enhanced insulin secretion and peripheral glucose uptake.
500-1000mg daily (standardized extract) or 300mg of high-potency extract
Morning and/or evening with meals. Tulsi tea form is also traditional.
Cycle 8-12 weeks on, 2-4 weeks off, or ongoing at lower doses
L-Theanine (gamma-glutamylethylamide) crosses the blood-brain barrier via the large neutral amino acid transporter. It increases alpha brain wave activity (8-13 Hz, associated with relaxed alertness), enhances GABA, serotonin, and dopamine levels in the brain, and antagonizes glutamate excitotoxicity by blocking glutamate binding at AMPA, kainate, and NMDA receptors. It also increases BDNF and NGF expression, supporting neuroplasticity. The combination of glutamate antagonism and GABA/serotonin enhancement produces anxiolysis without sedation — a 'calm focus' state.
100-200mg daily (or as needed for acute anxiety/focus)
Flexible: morning for calm focus (stack with caffeine), before stressful events, or evening for relaxation/sleep onset. Onset: 30-60 minutes oral, 15-20 min sublingual.
ongoing or as needed
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