Just in time for Christmas dinner, McDonald's offered its employees some healthy eating advice that has amounted to the fast-food giant's latest McSlip-up.

In its McResource Line internal employee site (which can be accessed by anyone with a valid email address), the home of the Big Mac and the Double Quarter Pounder with Cheese is ironically suggesting to its workers that they should practice a healthy lifestyle by avoiding fast food.

"Fast foods are quick, reasonably priced, and readily available alternatives to home cooking. While convenient and economical for a busy lifestyle, fast foods are typically high in calories, fat, saturated fat, sugar, and salt and may put people at risk for becoming overweight," one post on the site reads, as confirmed by CNBC.

The health advice also noted that regularly eating at fast food restaurants makes it hard to maintain a healthy diet.

"Although not impossible it is more of a challenge to eat healthy when going to a fast food place. In general, avoiding items that are deep fried are your best bet. Healthier choices include sandwiches that can be loaded with vegetables. Limit the extras such as cheese, bacon, and mayonnaise. Eat at places that offer a variety of salads, soups and vegetables to help maintain your best health," another post reads.

It should be noted that these messages of fast food avoidance on one of the world's largest fast food chain's website do not appear to have been produced by McDonald's itself, but by a third party. The messages that are making headlines this week are also dated, with posts from as long ago as 2009.

The global burger chain has already made a number of obtuse statements to its employees this year, including a tipping advice chart for luxury service providers such as massage therapists, au pairs, pool cleaners and personal trainers - services that are not likely purchased by the McDonald's workforce, who make a median wage of less than $9 per hour, according to CBS News.

In another gaffe, the $7 billion dollar company offered budget advice to employees that suggested taking a second job, and omitted accounting for basic necessities such as paying for water and childcare.