Cross-referencing clinical data
A pairing appears on this page only when a trial gave both ingredients together and measured the result. English Elm 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.
English elm and slippery elm are both Ulmus species whose inner bark yields a polysaccharide mucilage that swells in water. Slippery elm is the material that actually carries the monograph history and the supply chain, so where English elm appears it is usually as a botanically adjacent substitute. Buyers should note that the two are not interchangeable on a certificate of analysis. Species identity should be confirmed by the supplier.
Both materials work by hydrating into a viscous polysaccharide gel rather than by any absorbed constituent. Combining them raises the viscosity of the preparation, which is the whole point of a demulcent blend. This is long-standing formulation convention in herbal practice. The mechanism is physical, so it does not depend on anything reaching the bloodstream.
Elm bark mucilage and psyllium both form viscous solutions in the gut lumen and their effects on viscosity stack. That same viscosity slows the dissolution and uptake of anything taken alongside, including medicines. Standard practice is to separate a viscous fibre dose from other oral products by a couple of hours. Adequate fluid intake matters with both.
Elm bark carries tannins alongside the mucilage, and tannin-iron complexes are poorly absorbed. The mucilage viscosity adds a second, physical barrier to mineral uptake at the same time. Both effects point the same direction, so spacing the doses is sensible. This concerns absorption from a single meal, not long-term iron status by itself.
Nothing specific on file for English Elm. 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.