Cross-referencing clinical data
A pairing appears on this page only when a trial gave both ingredients together and measured the result. Jamaican Dogwood has none that clears that bar.
Stitching two separate single-ingredient studies into a pairing is the one thing this engine will not do. When a study of the combination itself holds up at source, it lands here with its citation.
No invented synergy. Where actives were studied on their own rather than together, the record shows each on its own evidence, never a combined effect no trial measured.
Research strength. Research strength says how much work stands behind the combination. It is never a product score.
Independent record. Every finding is cited to a named trial, dated, and never written by the brand.
20 pairings are live across the library today. Checked 20 July 2026.
No study gave these as a pair, so they are not in the card above. But the reason they belong together is settled biochemistry, not a guess, so it is worth knowing.
Jamaican dogwood bark and valerian root appear together in traditional Western sleep formulas. Both are sedating, and combined they produce more drowsiness than either does alone. Human data on the combination does not exist, so the caution is mechanistic and the tradition is old rather than tested.
Passionflower is one of the most common partners for Jamaican dogwood in traditional formulas. Both reduce arousal, so the sedation stacks. Anyone driving or operating machinery should assume the combination is more sedating than a single herb.
Melatonin shifts sleep timing while Jamaican dogwood contributes a general sedative load. Layered, the drowsiness compounds and morning grogginess is more likely than with either alone. Start low if combining at all.
Chamomile contributes apigenin, which binds benzodiazepine-site receptors weakly, and is a conventional partner in evening tea blends. The pairing is traditional formulation practice. No controlled human work describes the combination.
Honokiol and magnolol positively modulate GABA-A signalling in laboratory work. Stacked with a sedating bark preparation, the effects run the same direction. The magnitude in people is unknown for either ingredient at supplement doses.
Bark decoctions are commonly softened with a small amount of ginger for palatability and to reduce gastric upset. This is a formulation convention rather than a pharmacological interaction.
Nothing specific on file for Jamaican Dogwood. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.