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Menthol is a covalent organic compound made synthetically or obtained from peppermint or other mint oils. It is a waxy, crystalline substance, clear or white in color, which is solid at room temperature and melts slightly above. The main form of menthol occurring in nature is (-)-menthol, which is assigned the (1R,2S,5R) configuration. Menthol has local anesthetic and counterirritant qualities, and it is widely used to relieve minor throat irritation.

Latest findings

Even if food enriched with 0.1% of Menthol elicited an aversion, females still laid eggs on it allowing the establishment of Menthol lines. [source, 2016]
Parental “control line,” strains unexposed to Menthol, were kept in similar laboratory conditions. [source, 2016]
We performed 4-choice tests using 4 egg-laying sites filled respectively with 0, 0.01, 0.1, and 0.5% Menthol food. [source, 2016]
Sites with less than 10 eggs were discarded as for 0.5%, Menthol concentration where females rarely oviposited. [source, 2016]
When Menthol concentration increased, females displayed a strong aversion and only about 10% of the eggs were laid in the 0.1% Menthol site whereas females rarely laid eggs on 0.5% Menthol. [source, 2016]
Females raised on Menthol began to lay eggs earlier than those raised on Control and P-food (ANCOVA, F3,236 = 916.05, p < 0.0001) (Figure ). [source, 2016]
Larvae fully developed into adulthood in a similar way in control media and media supplemented with 0.01 or 0.1% of Menthol (K3 df = 2.772, p = 0.4282) (Figure ). [source, 2016]
Menthol at the tested concentrations did not delay nor compromise D. melanogaster development. [source, 2016]
This situation concerns the European Standard and atopic Patch tests. [source, 2016]
No ethological isolation was found when fruit extracts or chemical components (as Menthol or Ethanol) were added to control food, without changing the type of food. [source, 2016]