A treadmill is an example of a legit weight loss product.

>Here's a rule of thumb: exercise very hard for one hour (swimming, running, or racquetball) and you'll lose about one ounce of fat. Light exercise for an hour (gardening, baseball, or golf) will lose you a third of an ounce. Want to lose a pound of fat? You can work it off by hiking to the top of a 2,500-story building. Or by running 60 miles.

https://muller.lbl.gov/TRessays/22-ThePhysicsDiet.htm

Caloric restriction is the way to lose weight. If that knowledge is not enough, and a book doesn't fix the problem, the solution is likely a regiment, program, club, routine, or subscription. Enter Weight Watchers. https://health.usnews.com/best-diet/weight-watchers-diet https://health.usnews.com/best-diet/best-weight-loss-diets

If paying money to a service to help you count calories does the trick, it is the answer. Food consumption routines and subscriptions should be allowed, because despite being profitable businesses, they also are beneficial to society. It may or may not be hard for WW to deliver its message around this ban. I would hope that Pinterest has somewhat flexible rules, and makes good judgement calls when something is close. I personally would err on the side of allowing WW to advertise, without letting it be a slippery slope back to snake oil.

Ads in question are most likely not about treadmill but high-margin supplements / meal substitutes with dubious results.

"for use in addition to a reduced calorie diet and increased physical activity"

So really it's not doing much other than reducing how hungry someone feels.

Want to lose weight? It's easy. Go keto. For people that are fat, like myself, cutting carbs will, by nature, cut calories and a higher fat/protein diet will make you feel more full and eat less calories.

The problem is a lot of people like myself want to lose weight while still eating fast food and sitting down all day. No pill/injection will change that.

or get a meal plan that pre-portions your meals. My partner and I struggled to do keto, we lasted like 3 months. The results were impressive, but not sustainable for us.

We've started a pre-packaged meal plan. Meals are normally good (only had a couple we didn't like) but we are down a combined 75+ pounds and still doing the pre-packaged meals since we get a decent selection. Now, we do get a TON of chicken, and that is a struggle, but it's a trade off.

As to your last point, agree. There's no magic pill that will let you lose weight without fundamental changes

Yeah longer term I don't think Keto is sustainable without eating a LOT of fat. I don't get people that are twigs going on it. But if you need to burn fat away theres almost no better way.

Oh interesting. Being pedantic here but I'm guessing there's a strong distinction between "weight regulation" and "weight loss" in the regulatory context though?

There are people and products that promote eating in ways that cause weight loss. Calorie reduction via various methods.

Eg ads for low calorie cookbooks, things to sis keto diets, low calorie products like ice cream, etc

Are weight loss products "medical devices?"