A doctor is breaking down the biggest myths about popular weight loss trends, revealing whether or not these fads actually work, or if they're just a waste of money and time.

The important information was shared in a new video posted to TikTok by New York City-based Dr. Daniel Rosen, who specializes in weight loss surgeries like the Lap-Band and Gastric Sleeve.

He often takes to his account to share various tips about taking GLP-1 medications like Ozempic and Mounjaro, and information about bariatric surgery.

This time, however, he decided to run through a number of different weight loss fads, and whether or not they're the real deal.

The first one that he began with were detox teas, which are often peddled on TikTok as weight loss solutions.

Dr. Rosen did not give his seal of approval on these, as he labeled them as 'super expensive laxatives.'

'Focus on hydration and getting enough fiber, and everything should work itself out fine,' he explained.

Next on his list was the waist trainer, which some believe can change the shape of your body and waist, similar to a classic corset. 

The important information was shared in a new video posted to TikTok by New York City-based Dr. Daniel Rosen, who specializes in weight loss surgeries like the Lap-Band and Gastric Sleeve

The important information was shared in a new video posted to TikTok by New York City-based Dr. Daniel Rosen, who specializes in weight loss surgeries like the Lap-Band and Gastric Sleeve

He often takes to his account to share various tips about taking GLP-1 medications like Ozempic and Mounjaro, and information about bariatric surgery (stock image)

He often takes to his account to share various tips about taking GLP-1 medications like Ozempic and Mounjaro, and information about bariatric surgery (stock image)

Waist trainers are undergarments usually made from spandex, nylon or latex, per Cleveland Clinic, with some brands even including boning at the waist.

In the past, they've been peddled by The Kardashians, with Kim even selling them under her lucrative Skims line.

However, they're not something you should be using, per the doctor.

'They do nothing for fat loss, they're great under a dress if you're looking to achieve a certain shape, but they can be uncomfortable for the wearer,' he said.

'They just push fluid out of that section, but as soon as you take the waist trainer off, everything equilibrates and you look the same as before you did before it went on,' he shared.

Dr. Rosen was then asked about high-protein diets, which was something he gave his stamp of approval on.

'I'm all for it,' he said. 'It keeps you full, maximizes your weight loss, preserves your muscle mass.'

'Big on high protein diets,' Dr. Rosen added.

Dr. Rosen was then asked about high-protein diets, which was something he gave his stamp of approval on

Dr. Rosen was then asked about high-protein diets, which was something he gave his stamp of approval on

Next, he spoke about GLP-1 medication, like Ozempic, which he also approved of.

Over the past few years, GLP-1 medications, which have historically been used to treat type 2 diabetes, have become extremely popularized as a weight-loss aid.

Ozempic contains a compound called semaglutide, which 'mimics the GLP-1' hormone, according to UCLA Health, a hormone that can work with your brain to suppress your appetite and make you feel fuller more quickly.

When it's taken in a high dose, combined with diet and exercise, it can help people lose weight.

'Backed by science, proven effectiveness to improve your sugar control, lose weight, amazing,' he said.

And, last but not least, Dr. Rosen revealed whether or not apple cider vinegar was a legitimate tool to use for weight loss.

Per Harvard Health, many have claimed that the substance works wonders for weight loss, but there is little to prove that.

'I love it in salad, but it has no proven efficacy in losing fat,' Dr. Rosen confirmed.

'If you want to take a shot of it every once in a while, it's not gonna hurt, but don't expect any miracles,' he continued.

He concluded by sharing that the moral of the story here was that if something seems to good to be true, it probably is - aside from GLP-1 medications, which he called a 'legit miracle.'