ScienceIndependently confirmed2 publishers2 min readPublished Updated
Three beech mushroom peptides make salt water taste up to 71% saltier to trained tasters
Researchers at Gannan and Shanxi medical universities report that beech mushroom peptides raised the saltiness ratings of salt water by as much as 71%. Every sample in each comparison held the same salt, so the study has not yet measured how much sodium the peptides could save.
The Scientist · Science desk
Ranking of three peptides by how much each increased the saltiness rating: ASHGEGF first at 70.59 percent, LDDGF second at 49.02 percent, GDDWT third at 47.06 percent.
Increase in saltiness rating, percent
| Rank | Item | Value | Claim |
|---|---|---|---|
| 1 | ASHGEGF | 70.59% | 7 |
| 2 | LDDGF | 49.02% | 7 |
| 3 | GDDWT | 47.06% | 7 |
What happened
- The team broke mushroom proteins down with enzymes, found 6,092 peptide sequences, and used computational screens to narrow them to five candidates to synthesize and test.
- Two other peptides, LDDGF and GDDWT, raised saltiness ratings by 49.02 and 47.06 percent respectively.
- On fitted taste curves, saltiness lasted 105 seconds with the strongest peptide and 90 seconds with the other two, against 75 seconds for plain salt water.
- Computer simulations suggested the peptides form stable associations with a model of TMC4, a membrane protein linked to salt taste, mainly through hydrogen bonds.
Why it matters
- cost At the tested dose a seasoning would need peptide in bulk, so whether it makes commercial sense depends on lower doses still working.
- constraint Software only predicted toxicity and allergenicity, so a commercial ingredient would still need proper safety testing before it could go into food.
- constraint Cooking, storage and other ingredients could change how the peptides behave, so ratings taken in plain salt water cannot yet guide a recipe.
Each peptide went into salt water at 1 milligram per millilitre, against 3 milligrams of sodium chloride per millilitre. The control was the same salt water with no peptide in it [6]. Fourteen trained assessors aged 19 to 34 rated the samples by sip and spit, using reference solutions to keep their scores consistent [5]. Because the salt was held constant, a difference in sodium cannot explain the higher ratings. We would want a larger, untrained panel before treating the size of the effect as general.
The dose is large. One milligram of peptide for every three of salt means the additive weighed a third as much as the salt it was boosting [21]. Some peptides have tastes of their own, umami among them, and certain umami peptides were already known to strengthen the perception of saltiness [20]. The team used machine learning to pick out sequences likely to taste of umami [4].
An electronic tongue, an instrument that reads chemical samples as electrical signals, gave all three mixtures higher saltiness readings than plain salt water [10]. ScienceAlert describes this as complementary evidence that the mixtures differed [10]. We take the instrument as confirming a chemical difference. The human ratings are still the main result.
The TMC4 binding comes from a simulation [11]. Salt perception runs through several pathways, and the authors say receptor studies and cell experiments are needed to show how the peptides act in human taste cells [12].
The public-health target is already set. The World Health Organization recommends that adults take in less than 2 grams of sodium a day, equal to less than 5 grams of salt [15]. High sodium raises blood pressure, and with it the risk of cardiovascular disease [16]. Cutting salt also changes how food tastes, and lower-sodium recipes become harder to enjoy [17]. A large trial reported by ScienceAlert found health benefits from swapping regular salt for a lower-sodium mix with added potassium [18]. The mushroom work asks a different question: whether an added ingredient can make the salt already in the food taste stronger [19].
In our view the screening was done carefully, and the effect is real at the one dose and salt level tested. Putting a number on sodium savings takes a different experiment. It would reduce the salt in the peptide sample until tasters rate it the same as the plain control.
What to watch
- Results from the authors' planned tests in real low-sodium foods, and whether they report how much salt can be removed before tasters notice a difference.
- Receptor and taste-cell experiments testing whether the peptides act through TMC4 or through another salt-taste pathway.
Clarity's read
What the record supports and how the coverage leans. The claims behind it follow.
Reality
- Evidence45
- Adoption
- Insufficient
- Hype gap+30
- Incentives
- Insufficient
- Confidence65
Claim ledger
Ranked by verification strength, evidence, and original report placement.
- [1]
The study, published in npj Science of Food and led by researchers at Gannan Medical University and Shanxi Medical University, tested peptides from the edible beech mushroom (Hypsizygus marmoreus).
- [2]
Three mushroom protein fragments made salt solutions taste saltier in laboratory tests, with the strongest increasing perceived saltiness by about 71 percent.
- [3]
The team used enzymes to break down mushroom proteins; analysis revealed 6,092 peptide sequences, and computational screening for predicted solubility, stability, toxicity and allergenicity left five candidates to synthesize and test.
- [4]
Machine learning helped select sequences likely to produce umami.
- [5]
14 trained assessors, aged 19 to 34, evaluated the samples using a sip-and-spit method, with reference solutions to help them rate taste consistently.
- [6]
Each peptide was added at 1 milligram per millilitre to a solution containing 3 milligrams of sodium chloride per millilitre; the control contained the same salt concentration without an added peptide.
- [7]
ASHGEGF increased the saltiness rating by 70.59 percent; LDDGF and GDDWT increased it by 49.02 and 47.06 percent, respectively.
- [8]
A 71 percent increase in perceived saltiness does not mean 71 percent of the salt could be removed; both solutions contained the same salt concentration, and the researchers did not establish how much sodium could be cut while keeping the taste unchanged.
- [9]
In fitted taste-intensity curves, saltiness lasted 75 seconds for the plain solution, 105 seconds with ASHGEGF, and 90 seconds with each of the other two peptides.
- [10]
An electronic tongue, which measures chemical samples through electrical signals, registered higher saltiness readings for all three mixtures than for the plain salt solution, providing complementary evidence that the mixtures differed.
- [11]
Computer simulations of TMC4, a membrane protein associated with salt taste, suggested the peptides could form stable associations with the model, largely through hydrogen bonds.
- [12]
The simulations do not confirm how the molecules work in human taste cells; salt perception involves several pathways, and the authors say further receptor studies and cell experiments are needed.
- [13]
The computational predictions helped prioritise molecules but did not establish the safety of a future commercial ingredient.
- [14]
Other ingredients, cooking and storage could affect how well the peptides perform; the authors plan to test them in actual low-sodium foods and assess their sodium-reduction potential.
- [15]
The World Health Organization recommends that adults consume less than 2 grams of sodium daily, equivalent to less than 5 grams of salt.
- [16]
High sodium intake raises blood pressure, increasing the risk of cardiovascular disease.
- [17]
Reducing salt can change the taste of food, making a healthier formulation harder to enjoy.
- [18]
A large trial previously covered by ScienceAlert found health benefits from replacing regular salt with a mixture containing less sodium and added potassium.
- [19]
The mushroom study asks whether an ingredient could make the salt already present taste stronger.
- [20]
Some peptides have tastes of their own, including umami; certain umami peptides can also strengthen the perception of saltiness.
- [21]
The peptide was dosed at one third of the salt's mass in the tasting solutions.
Sources
2 independent publishers whose own reporting we read for this story.
- phys.orgMushroom-derived peptides boost saltiness by up to 70%, offering a path to low-sodium foods
1 article · October 13, 2026
- sciencealert.comAdding 1 Mushroom-Derived Molecule to Salt Can Make It Taste 71% Saltier
1 article · October 10, 2026
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