A WOMAN who slimmed down to half her size has had her fully-clothed weight loss photo pulled down by Facebook because it promoted "adult content".

Marilyn McKenna, wife of former Washington State Attorney General Rob McKenna, posted the image of her fitting both her legs inside one leg of her old "fat pants" but was told to remove the picture because it was promoting "idealised physical appearances".

Ms McKenna, who weighed 120kg six years ago, lost 54kg after having lap band surgery, USA Today reported. She has kept the weight off by adopting a strict new healthy lifestyle which she documents on her blog and Facebook fan page.

A representative from Facebook emailed her to explain why her "ad" was taken down.

"The image used here is of a woman standing in a large pair of pants holding the waist band out to show weight loss. The images are considered to be promoting idealised physical appearances and are policy violating," the spokeswoman wrote.

"It is also worth noting that things like before and after photos, images with scales, tape measures, zoomed in body parts are also considered to be promoting idealised physical images and are not allowed."

She was then told that she was promoting "adult content".

Ms McKenna is outraged at the response.

"I can't even fathom what they're thinking," she said.

"I call bulls*** on Facebook."

Hey, Facebook! What "products" am I promoting?! You dunderheads! My website, my blogs, my videos... It's all free!! Im not selling anything! — Marilyn McKenna (@mckennamarilyn) January 10, 2014

A representative from Facebook told KOMO News the post was considered an ad because Ms McKenna was attempting to "boost" the post. Facebook considers boosted posts, which are paid for, to be ads.

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