Passiflora Incarnata Whole.

Passionflower and valerian are the classic European pairing for normal evening wind-down, both acting on GABA-A signalling by different routes. Their calming effects are additive, so the combined dose should be set as one.

Hops bitter acids and passionflower flavonoids both push normal evening wind-down and appear together in traditional sleep formulas. Their effects add, so the pair is dosed as one.

Lemon balm rosmarinic acid inhibits GABA transaminase, raising available GABA, while passionflower flavonoids act at the receptor side. The two ends of the same pathway pair naturally.

Chamomile's apigenin and passionflower's flavones bind the same benzodiazepine recognition site on the GABA-A receptor. Combining them stacks occupancy at one target rather than adding a mechanism.

Apigenin is one of the flavones carried in passionflower aerial parts and accounts for part of the plant's receptor binding. Supplying it separately concentrates a compound the herb already contains.

Chrysin is a characteristic passionflower flavone with affinity for the benzodiazepine site. Pairing the isolate with the whole herb duplicates rather than diversifies the mechanism.

Kavalactones modulate GABA-A allosterically and slow sodium channel activity, which adds to passionflower's own receptor effect. Two calming agents at full dose behave as one larger dose.

Scutellaria flavones such as baicalin bind the same GABA-A benzodiazepine site that passionflower flavones occupy. The effects add rather than complement.

Theanine raises alpha wave activity and dampens glutamate signalling, a route separate from passionflower's GABA-A binding. The two cover different halves of normal calm.

Magnesium sits in the NMDA receptor channel and its glycine carrier binds inhibitory glycine receptors, both distinct from GABA-A.

Melatonin works through MT1 and MT2 receptors that set circadian timing, while passionflower works on GABA-A tone. The two address different parts of normal sleep onset.

Supplemental GABA and passionflower flavonoids converge on the same receptor system from the ligand side and the modulator side. Their calming effects add together.

Glycine acts at its own inhibitory receptor and lowers core temperature at night, a route independent of GABA-A.

5-HTP feeds serotonin synthesis, which supplies the substrate for evening melatonin production, a different axis from passionflower's receptor modulation.

Tryptophan is the upstream precursor for serotonin and melatonin, a pathway passionflower does not touch. That makes it complementary rather than duplicative.

A veterinary nutraceutical combining Passiflora incarnata with Withania somnifera has been assessed in animals, so the pairing exists as a formulated product and not only as a marketing habit. Ashwagandha is discussed at the hypothalamic-pituitary-adrenal axis while Passiflora is discussed at GABA-A, so the two do not compete for the same site. Human data on the specific combination is what is missing.

Glutamate decarboxylase, the enzyme that makes GABA from glutamate, requires pyridoxal 5-phosphate as its cofactor. Passiflora flavones act at the receptor end of that same signalling, so B6 supports the supply side while the botanical works downstream. This is textbook biochemistry rather than a tested pairing.

St John's wort induces CYP3A4 and P-glycoprotein, which lowers circulating levels of a wide range of co-taken compounds. Anyone combining it with a calming botanical blend should expect altered exposure to whatever else is in the regimen, including prescription medicines. This is a flag to raise with a clinician, not a recommended pairing.

Rhodiola is used for a stimulating, alertness-leaning kind of stress support while Passiflora leans sedating. Placing them in one formula pulls in two directions, which some blends do deliberately to smooth the profile across a day. There is no combination trial, so read the pairing as formulation reasoning.

Bacopa is used to support normal cognitive function and carries a mild calming character in practice. It appears with Passiflora in blends aimed at a settled mental state. No study has measured the two together, so this is a formulation convention with a mechanistic story behind it.

Honokiol and magnolol are positive allosteric modulators at GABA-A in preclinical work, at a site distinct from the benzodiazepine site where Passiflora flavones are described. Combined, the sedating inputs add up. Count them as one total rather than two separate contributions.

Luteolin belongs to the same flavone class as the apigenin and chrysin found in Passiflora and shares the low-affinity benzodiazepine-site binding reported in vitro. Adding isolated luteolin raises the flavone load the extract already contributes. The overlap is mechanistic and has not been measured as a combination.

Quercetin and the Passiflora C-glycosyl flavones are conjugated by the same UGT and sulfotransferase enzymes after absorption. High combined intake can saturate those routes and shift the ratio of free to conjugated flavonoid. This is a pharmacokinetic point, not evidence of a larger effect.

Taurine is a weak agonist at GABA-A and glycine receptors and acts as an osmolyte in neural tissue. Passiflora flavones are described at the benzodiazepine site of the same receptor family. The pairing shows up in evening formulas and rests on mechanism rather than on a combination trial.

Inositol is a second messenger in serotonergic and cholinergic signalling and is used at gram doses in calm-support formulas. Its route differs from the receptor-level story told for Passiflora flavones. No study has measured the two together.

Ascorbate regenerates oxidised flavonoid radicals in solution, which matters mainly for the stability of a finished botanical product. It is a formulation-level interaction. It says nothing about the calming properties attributed to the herb.

Piperine inhibits glucuronidation and several CYP isoforms, which raises exposure to many co-dosed polyphenols. Passiflora aglycones are heavily glucuronidated, so a piperine-containing blend plausibly delivers more circulating flavonoid from the same label dose. Higher exposure is a change in effective dose and should be read that way.

Phospholipid complexation is a routine way to carry poorly soluble flavonoid aglycones across the gut wall, and lecithin doubles as a flow agent in dried herb powders. The contribution is delivery and manufacturability. It is not an active in its own right here.