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Among the various health claims associated with fasting, one particularly intriguing topic is its impact on testosterone levels

and several related peptides in different species, such as hemokinin-1 (HK-1) in mice, endokinin-1 and -2 (EK-1 and EK-2) in rabbits, and endokinins AD (EKA, EKB, EKC and EKD) in humans [97]

[DOI] [PubMed] [Google Scholar] 11.Sikiric P., Drmic D., Boban Blagaic A., Tvrdeic A., Krezic I., Gojkovic S., Zizek H., Sikiric S., Strbe S., Smoday I.M., et al

Deeper breathing becomes more comfortable

However, experts have expressed concern that there is little scientific evidence to support the peptides being considered