Cross-referencing clinical data
A pairing appears on this page only when a trial gave both ingredients together and measured the result. Linden 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.
Linden bract and chamomile flower appear together in evening tea blends across continental Europe, and both contribute apigenin-type flavones. The rationale is traditional and chemical overlap rather than a tested combination effect. No controlled human work separates the pair from its parts.
Melissa and Tilia are conventional blend partners, and both are used for the same traditional purpose. Anyone combining them is stacking two mild botanicals with a similar intended direction. The combination has not been tested against either herb alone in humans.
Valerian has a substantially stronger sedative reputation than linden, so in a blend it will dominate the effect. The relevant point is additivity: combining calming botanicals, or combining them with sedating medication or alcohol, stacks in one direction. That stacking is the thing to watch rather than any synergy claim.
Passiflora and Tilia both carry flavone glycosides and both sit in the calming category of European herbal practice. Their combined effect has not been isolated in controlled work. Read the pairing as additive in direction, with the caution that applies to any sedative-direction stack.
Linden flower carries mucilage, and marshmallow root carries considerably more. Mucilage forms a viscous layer on contact, which is a physical demulcent action and is the reason both appear in throat-soothing infusions. Because the mechanism is contact-based, hot water extraction and drinking volume matter more than the milligram dose.
Slippery elm and linden both work by physically coating mucosa with polysaccharide gel. Combining them raises the viscosity of the preparation, which is the actual variable at work. Note that a viscous preparation can also slow the absorption of anything taken alongside it.
Honey is the conventional addition to linden tea and adds to the coating effect on the throat. It is a vehicle rather than an active partner. Honey should not be given to infants under one year.
Tannin-containing herbal teas reduce non-heme iron uptake by forming insoluble complexes in the gut lumen, the same effect documented for black tea. A linden infusion taken with an iron supplement or an iron-containing meal will lower the iron absorbed. Separating them by a couple of hours removes the interaction.
Tiliroside, the marker flavonoid of Tilia, is a kaempferol glycoside, and quercetin glycosides sit alongside it in the flower. Adding isolated quercetin adds more of a compound class the herb already supplies. This is a dose consideration, not a new mechanism.
Nothing specific on file for Linden. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.1 source behind our Linden verdict: peer-reviewed studies and registered clinical trials. Every one links straight to PubMed, the journal, or ClinicalTrials.gov. Read them yourself.
Evidence surfaced via Semantic Scholar (Allen Institute for AI) and ClinicalTrials.gov. Ranked by study type and citation weight, not cherry-picked.
Read this carefully. These are 37 voluntary, unverified reactions reported to the FDA (openFDA). The number mostly reflects how popular Linden is, not how risky it is. A report is not proof Linden caused anything. It is a signal of what to watch for, nothing more.
Source: openFDA adverse-event reports. Voluntary reporting, not an incidence rate.
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.