Applying a male’s underarm sweat to a female’s lip can help women relax, boost their mood and help regulate their menstrual cycle.

There is inconclusive scientific proof about inducing relaxing and regulating effects in women by application of men's underarm sweat on their lips.

There is inconclusive scientific proof about inducing relaxing and regulating effects in women by application of men's underarm sweat on their lips.According to the study conducted by the 'Society for the Study of Reproduction', published by the Oxford University Press on 1 June 2003, exposure of heterosexual women to the primer and modulator pheromones found in the male axillary secretion (underarm sweat) can reduce tension, increase relaxation, and regulate the menstrual cycle.

As per the study conducted by the University of California - Berkley, published by ScienceDaily on 8 February 2007, a group of heterosexual women were exposed to the male axillary pheromones through smell. Elevated moods depending on the recipient and their perception were recorded.

As per an article published by PubMed Central in 2013, there are four different kinds of pheromones, among which the primer pheromones elicit an often immediate, specific, behavioural response and the modulator pheromones affect mood and emotion.

Though studies say that a concentrated form of the male axillary secretion was used, they do not exclusively conclude that men's underarm sweat in its natural form can be applied on lips to have the said relaxing effect.

CORRECTION: A previous version of this fact-check stated the claim to be true. Judgement has been changed to False. In fact, on verifying it again we found this claim to be misleading as the studies do not show that sweat needs to be applied on lips to have the said effects on women's mood.