Cross-referencing clinical data
A pairing appears on this page only when a trial gave both ingredients together and measured the result. Common Lilac 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.
Lilac flower extract carries verbascoside and related phenylethanoid glycosides, which oxidise and brown in aqueous solution. Ascorbate slows that loss in liquid preparations. This is shelf chemistry rather than a biological pairing. It matters for tinctures and cosmetic serums more than for capsules.
Syringa vulgaris carries secoiridoid glycosides characteristic of the Oleaceae, including oleuropein-type compounds and syringopicroside. These are the same structural class found in olive leaf. Any preparation of lilac flower or bark delivers iridoids as part of the native matrix, not as an added ingredient. Absorption follows the same microbial deglycosylation route as other iridoid glycosides.
Lilac flowers contain flavonol glycosides including quercetin and kaempferol derivatives alongside the phenylethanoids. Adding isolated quercetin raises the same pool the extract already contributes to. Both compete for the same intestinal glucuronidation capacity at high doses. There is no evidence that the combination does more than either alone.
Rutin is quercetin-3-rutinoside and lilac flower carries structurally similar flavonol glycosides. Both require deglycosylation before absorption and both are heavily conjugated afterwards. The pairing is compositional overlap, not a demonstrated interaction. Read it as describing what is already in the extract rather than a reason to combine.
Olive and lilac are both Oleaceae and share the oleuropein-type secoiridoid biosynthetic route. Olive material is far better characterised, so what is known about oleuropein handling gives a reasonable starting point for the lilac compounds. That is a chemical inference, not a transfer of clinical evidence. The two should not be presented as interchangeable.
Lipophilic lilac preparations used topically oxidise over shelf life, and tocopherol is added to slow peroxidation of the carrier and preserve the phenolic fraction. This is standard formulation practice for phenolic botanical extracts in oil. It preserves the assayed content at end of shelf life. It says nothing about activity after application or ingestion.
Nothing specific on file for Common Lilac. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.These are the studies our verdict leans on, chosen from the 2 we read for Common Lilac. The full linked list is below.
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.