*This article may have affiliate links, which means we may receive commissions if you choose to purchase through links we provide (at no extra cost to you). For more details, please read our privacy policy/affiliate disclosure. Thank you for supporting the work we put into this blog!

Weight loss, in the con­text of med­i­cine, health, or phys­i­cal fit­ness refers to a reduc­tion of the total body mass, due to a mean loss of flu­id, body fat or adi­pose tis­sue and/or lean mass, name­ly bone min­er­al deposits, mus­cle, ten­don, and oth­er con­nec­tive tis­sue. Weight loss can either occur unin­ten­tion­al­ly due to an under­ly­ing dis­ease or arise from a con­scious effort to improve an actu­al or per­ceived over­weight or obese state. “Unex­plained” weight loss that is not caused by reduc­tion in calorif­ic intake or exer­cise is called cachex­ia and may be a symp­tom of a seri­ous med­ical con­di­tion. Inten­tion­al weight loss is com­mon­ly referred to as slimming.