What is the quickest weight loss people have experienced?

My understanding of the studies that I have read is that the quickest weight loss is not well correlated with keeping it off the longest.

Of course, the promise of quick weight loss has been used for a very long time to sell magazines and books and exercise equipment and supplements…. But I think part of our role as professionals who work on wellness and health is to promote a more reasoned expectation and process.

The nutritionist I most admire for her professionalism and knowledge (and the one I recommend to students who are interested in nutrition and weight control) underscores that as well.