Okay, We Need to Talk About the #LemonAndCoffee Challenge on TikTok

Photo credit: Hulton Archive - Getty Images
Photo credit: Hulton Archive - Getty Images

Our goal is to publish weight loss content with integrity, science-backed reporting, and insight on what you can realistically accomplish while attempting to lose weight in a healthy way. We feel it’s important for you to know that the biological connection between health and excess weight isn’t straightforward—and your BMI or the number on the scale is not a solid measure of health. Read more about the ways diets and diet culture can impact your physical and mental health.


Welp, TikTok is here with yet another problematic challenge. And like the 75 Hard Challenge, this one involves a very specific assignment for a very specific amount of time in the hopes of changing the way your body looks. How fun for us!?

Enter the coffee and lemon challenge, which calls for drinking instant coffee with a squeeze of lemon every morning for 28 to 30 days in order to lose weight.

To date, the hashtag #LemonAndCoffee has more than 8 million views from curious people. And while no one is pretending this lemon coffee stuff is tasty, many claim that they lost a significant amount of weight over the course of a month.

Can drinking coffee with lemon juice help you lose weight?

Basically, no, says registered dietitian nutritionist Christyna Johnson of EncouragingDietitian.com. “If someone were to see results from this particular trend, it is likely from a calorie deficit.” In other words, there’s no evidence that a coffee and lemon regimen without any other changes to your diet will result in weight loss, adds Philadelphia-based weight loss physician Charlie Seltzer, MD.

Can coffee alone help you lose weight?

Perhaps one of the reasons this trend took off is because some (sorta outdated) research suggests that caffeine can serve as an appetite suppressant by increasing levels of the hormones serotonin, epinephrine, and norepinephrine circulating through your bod, says Dr. Seltzer.

Also, it’s possible that “the caffeine in coffee can help increase your metabolism a little,” says Dr. Seltzer. Thing is, “a little” translates to roughly a quarter of a calorie per day. Thus, it won’t make much of a difference in your weight.

I’m no math genius, but Johnson confirms that in order to lose weight based on caffeine alone, you’d have to down way more coffee than what’s considered safe. “And the effects of caffeine abuse are not desirable nor fun.” Just FYI, those could include insomnia, anxiety, stomach issues, nausea, and/or straight-up nervousness.

Can lemon juice help you lose weight?

You’ve probably read or heard someplace that sipping hot water with lemon leads to weight loss or that downing the cayenne pepper, water, lemon, and maple syrup mixture (which made its rounds as a “cleanse” years ago) is weight loss fuel. But the hype is, um, just hype.

Although proponents of lemons for weight loss claim that it delays gastric emptying to help you feel fuller longer, even if that were true, it wouldn’t impact your weight, says Dr. Seltzer.

Is drinking coffee with lemon juice dangerous?

There are no further perks to destroying a perfectly good cup of coffee. And bonus: If you have preexisting sensitivities (as in you already get frequent heartburn or have a sensitive tummy), the extra acid won’t do your digestive system any favors, says Dr. Seltzer. Also also, all that exposure to acidic coffee and super-acidic lemon juice can erode your tooth enamel. Uh, yeah, that is bad.

The Bottom Line

Unfortch, the only way to lose weight is to consume fewer calories than your body burns. “Lemon in coffee sounds like a rough way to start the morning and a rude way to ease into the afternoon,” Johnson says. “Using [lemon coffee as a meal replacement] to avoid eating or ‘speed up your metabolism’ is not sustainable in the long-term, so 10 out of 10 would not recommend it for weight loss.”

A final word to the wise: “Don’t believe everything you see on TikTok,” Dr. Seltzer says. “If anyone is claiming to have lost 60 pounds by drinking lemon coffee, they didn’t do it just by drinking lemon coffee.”

You Might Also Like