Researchers have identified tiny molecules from beech mushrooms that intensified the taste of salt in laboratory testing. The finding could eventually help food makers preserve flavor while using less sodium, though practical applications remain unproven.
Peptides put to the test
The team studied Hypsizygus marmoreus, a mushroom known for its savory taste. After breaking down its proteins into peptides, researchers used computational screening to shortlist five candidates from thousands of sequences.
In tests with 14 trained tasters, three peptides noticeably increased the perceived saltiness of saltwater. The strongest, ASHGEGF, boosted the sensation by 70.59% compared with saltwater alone. Two others, LDDGF and GDDWT, produced increases of 49.02% and 47.06%. An electronic-tongue device also detected stronger responses, while the saltiness from ASHGEGF lasted longer in the tasting assessment.
Promising, but still preliminary
Computer models suggest the peptides may interact with TMC4, a protein associated with salt perception. This proposed mechanism has not yet been confirmed in human taste cells. The experiments also used simple salt solutions, not everyday foods, and did not establish how much sodium could be reduced or whether the peptides are safe for commercial use.
The findings were published in npj Science of Food. Further testing in real food products and safety assessments will be needed before the approach can be considered for wider use. If those studies confirm the effect, mushroom-derived peptides could offer a new way to balance flavor and sodium in future foods.
