Most weight loss influencer marketing advice stops at "work with micro-influencers" and "be authentic". We wanted to see what the biggest weight loss brands actually do, so we pulled the 50 most recent sponsored posts for each of the most-searched weight loss brands in the US and looked at who posted, how each deal was disclosed, and which posts took off.

Here's why weight loss brands work with creators, the commonalities in their strategy, and a step-by-step way to run your own campaign.

Why weight loss brands use influencer marketing

Creators do a few things for weight loss brands that ads and product pages can't:

• A quiz makes the first step small. Signing up for a weight loss program feels like a big commitment, and a free quiz makes it feel like a small one. 41 of Noom's last 49 sponsored posts ask viewers to take a free Noom evaluation or a 30-second quiz.
• Food posts show the plan is livable. People worry a plan means giving up the food they like, and a creator cooking a real dinner answers that. 6 of WeightWatchers' last 50 sponsored posts are recipes, from Korean BBQ chicken burritos to beef shawarma.
• Tracking looks easy when someone does it. Logging every meal sounds like a chore until a creator shows how fast it is. 7 of MyFitnessPal's last 49 sponsored posts show its voice logging feature, where creators say what they ate instead of typing it.
• A discount lowers the cost of trying. A membership is easier to try when the first month costs less, and creators can hand that offer straight to followers. 21 of Mochi Health's last 50 sponsored posts offer $40 off the first month.

Top weight loss brands using influencer marketing

These are the most-searched weight loss brands in the US, according to Ahrefs. Deal types show how each post was disclosed (for example, with a paid partnership label or an ambassador hashtag). Creator tiers: micro 10k–50k followers, mid-tier 50k–500k, macro 500k+.

1. WeightWatchers: creator codes with an end date

21 of WeightWatchers' last 50 sponsored posts include a creator code, most for $10 off the first month, and 10 of those say when the offer ends. 10 posts talk about GLP-1s alongside the WW program, and a May campaign, The Mother Issue, profiled Whitney Leavitt and Cynthia Bailey. 25 of its 27 creators with a listed location are in the US, and 13 of its 32 creators posted more than once.

• Creators: @cynthiabailey (4.0M), @thecarlawhite (313k) and @realronsina (939k) are among the creators who've posted for WeightWatchers.
• How posts were disclosed: 42 paid partnership, 8 ambassador

What to take from it: Let creators tell it in their own voice, jokes included. @realronsina's one-year post opened with a joke about his own life story and got 84k likes, 9% of his following and the most on WeightWatchers' page.

2. Mochi Health: a five-week creator push

All 50 of Mochi Health's last sponsored posts went live in five weeks, between May 27 and June 30, and 14 of them on May 28 and 29. 13 talk about its GLP-1 program, and 8 promote newer care like skin, hair and supplements. All 32 of its creators with a listed location are in the US, and 20 posts include a creator's own code.

• Creators: @latrezanderson (949k), @deniseandlevert (333k) and @ericaamarks (406k) are among the creators who've posted for Mochi Health.
• How posts were disclosed: 44 paid partnership, 5 ambassador, 1 affiliate

What to take from it: When you add new services, have a creator who already posts for you explain them. @ericaamarks walked followers through Mochi Health's new skincare, hair, menopause and longevity care and got 382k plays, the most of her three Mochi posts.

3. Noom: YouTube ads on channels far from fitness

All of Noom's last 49 sponsored posts are YouTube ads read by the channel's host, and 45 of them ran in 2022, so this is an older snapshot than the other four. Most come from channels with no link to weight loss, like sailing, home renovation, woodworking and film effects. Only one includes a Noom code, the data doesn't list where its creators are based, and the newest post, from August 2026, promotes its GLP-1 program on a finance podcast.

• Creators: @CorridorCrew, @Thoughty2 and @AYOFishing are among the creators who've posted for Noom.
• How posts were disclosed: 49 paid partnership

What to take from it: Test channels outside your category. A fishing channel, @AYOFishing, read Noom's free evaluation offer and got 91k likes, the most on Noom's page and more than the film effects channel @CorridorCrew (63k).

4. MyFitnessPal: ambassadors who post again and again

25 of MyFitnessPal's last 49 sponsored posts were labeled as ambassador posts, and 13 of its 17 creators posted more than once, all between July 1 and August 26. The app usually sits in the caption of a gym, running or food post rather than leading it, and only 3 posts mention its paid tiers, Premium or AI Coach. Its creators are based in the US (9), Australia (3), the UK and South Africa, and none of the posts include a MyFitnessPal code.

• Creators: @faithordway (1.6M), @geo.lindsey (177k) and @ellaswindle_ (46k) are among the creators who've posted for MyFitnessPal.
• How posts were disclosed: 25 ambassador, 22 paid partnership, 2 unspecified

What to take from it: Show the app inside a routine people want to copy. @ellaswindle_, a volleyball player with 46k followers, filmed her training, recovery and nutrition routine and got 812k plays and 33k likes, MyFitnessPal's most-viewed and most-liked post.

5. Herbalife: athletes and races, not weight loss

Herbalife's last 50 sponsored posts lean on athletes and sport rather than weight loss. 9 come from events it sponsors, like Ironman 70.3 Goa, a women's cricket league and a Manila half marathon, and only one caption touches on fat loss. 12 of its 20 creators with a listed location are in India, and none of the posts include a Herbalife code.

• Creators: @cristiano (669.1M), @joe_paintsil (231k) and @ironman70.3goa (25k) are among the creators who've posted for Herbalife.
• How posts were disclosed: 47 paid partnership, 1 gifted, 1 ambassador, 1 unspecified

What to take from it: Sponsor the races your buyers train for, and get the event to post. The Ironman 70.3 Goa account, with 25k followers, got 63.4M plays on a Herbalife-sponsored post, more than Cristiano Ronaldo's 44.7M.

What the top weight loss brands have in common

Looking across all 248 posts, four patterns stand out:

• GLP-1s are part of the pitch now. 25 of the 248 posts mention GLP-1s, almost all from WeightWatchers and Mochi Health, which sell medical weight care next to their apps.
• Smaller creators get more out of their audience. Across 136 posts with visible likes and follower data, creators under 50k followers got a median of 0.9% of their followers liking the post. For creators above 50k, it was 0.5%.
• Almost everything is disclosed as paid. 204 of the 248 posts were labeled as paid partnerships, and only 39 as ambassador posts.
• Partner hashtags are standard. 119 of the 149 posts from WeightWatchers, Mochi Health and MyFitnessPal carry a partner hashtag like #wwpartner, #mochipartner or #myfitnesspalpartner.

How to run a weight loss influencer marketing campaign

Here's how to run a campaign step by step, using what the top weight loss brands do at each stage.

1. Pick one goal and one metric

Decide what the campaign is for before you pick a single creator, because the goal changes who you book, how you pay them and what you ask them to post. The top weight loss brands' posts show both goals at work. WeightWatchers' and Mochi Health's creator codes are built to drive sign-ups that week. Herbalife's athlete and race posts are built for reach.

• Sales: track revenue per creator with a unique link and code.
• Awareness: track views, saves and reach per post.
• Sign-ups: if you sell a membership or app, like WeightWatchers' $10-off first month, track new members per creator code and how many stay past the first month.

Pick one metric per campaign so you can compare creators fairly afterwards.

2. Find and vet creators who fit your brand

Follower count is the last thing to filter on. A creator with 36k followers speaking straight to people still deciding whether to start Mochi Health's GLP-1 program got 840k plays, 23 times her following. Across the four brands with follower data, creators under 50k followers got more than one and a half times the likes relative to their audience.

Our survey found niche micro-creators are outperforming mega-influencers: nearly 60% of marketers said niche influencers performed better in 2025 than in 2024.

• Write down who buys your product (busy parents getting back into a routine, gym-goers counting macros, people starting a medical weight program) and look for creators living that life.
• Search Modash's database of 380M+ creators and filter by audience demographics (age, gender, location), bio keywords, engagement rate and fake-follower checks.
• Or describe that creator in plain language, like "creators who post full days of eating", and Modash's AI creator search surfaces matching creators on the platform you're searching.

• Check who else they've posted for. @healthwithhunter posted for WeightWatchers and for supplement brands Seed, Vital Proteins and Grüns. Modash shows which brands a creator has already posted sponsored content for.

You can also find weight loss influencers for free, for example by searching the hashtags your buyers follow.

3. Choose the deal type

Paid posts lead in weight loss. WeightWatchers, Mochi Health and Herbalife disclosed 42, 44 and 47 of their last 50 posts as paid partnerships, and all 49 of Noom's were paid. MyFitnessPal is the exception, with more ambassador posts than paid ones.

• Gifting works for products creators can use on camera from day one, like a shake, a snack or a kitchen scale.
• Paid posts suit launches and seasonal pushes that have to land on a date, like New Year or Mochi Health's five-week burst.
• Affiliate works for memberships and refills people pay for every month, where a creator earns on each new member.
• Ambassador deals suit creators who already track their food or training and can post about it every week, like MyFitnessPal's ambassadors.

Commission-only is getting harder to sell, though. Over 23% of marketers in our survey said creators would take performance pay only if a flat fee came with it. If you run tiers, the average commission tiers in our affiliate research were 10%, 14% and 19%, and brands with more than one tier had more active affiliates.

4. Brief the content formats that work in weight loss

The captions from the top weight loss brands point to three formats that carry most of their creator content:

• Recipes and meal breakdowns. 20 of MyFitnessPal's last 49 posts share a recipe, a meal or its calories and macros. Ask for a dish followers can cook this week, with the numbers on screen.
• Shakes and fuel. Herbalife's athletes and recipe accounts share the shakes and drinks they mix before and after training. Show the product being made, not just held.
• Journey updates. 37 of WeightWatchers' and Mochi Health's 100 posts describe the plan as a "journey". Let creators talk about how it fits their life, and keep weight numbers out unless legal has approved them.

Whatever the format, give creators one partner hashtag to use every time and the exact claims and disclaimer lines legal has approved.

5. Launch with tracked links and time-limited codes

WeightWatchers and Mochi Health lean on codes: 21 and 20 of their last 50 posts include a creator code. Noom's YouTube reads send viewers to a link and a free evaluation, with just one code, and MyFitnessPal and Herbalife don't use their own codes at all.

Codes also leak. In our affiliate marketing research, 47.6% of marketers said they struggle with code poaching, where a creator's code ends up on coupon sites.

• Give every creator a tracked link for everyday posts, and add a code only for launches and sales.
• Put an end date in the caption so followers know the offer won't last.
• If creators use "comment for the link", make sure the link they send by DM is their tracked link.

In Modash, each creator gets a tracked link and a code tied to your Shopify data, so sales from DMs, bios and stories all count toward the right person. Commission is calculated on net revenue after refunds and returns.

6. Rebook your best creators

The top weight loss brands rebook a lot: 50 of their 158 creators posted more than once. MyFitnessPal's @__doots posted eight times in under two months, and Mochi Health's @magdabueno posted four times in two weeks. That matters here, because followers trust a plan more when they watch someone stick with it.

Most marketers want to do more of this. In our influencer marketing trends survey, over 60% said they plan to invest more in long-term partnerships, but only 54% actually ran more of them last year.

• Start new creators on a single post, then offer a longer deal to the ones who hit your metric from step 1.
• Use revenue per creator, not likes, to decide who gets rebooked. Modash's campaign dashboard shows revenue, orders and ROAS for each creator.
• Give rebooked creators something new each time, like a new app feature to show, a recipe to cook or a check-in on how the plan fits their week, so their posts don't repeat.

Where weight loss creator programs go wrong

The top brands avoid a few mistakes that trip up smaller programs:

• Going silent after January. Interest in weight loss peaks at New Year, and it's tempting to book every creator for the first two weeks of January. People who started then need the most encouragement in February and March, when motivation drops. Spread posts across the first months of the year and book check-in posts, not just kickoff posts.
• Offering commission-only deals to established creators. In our survey, 63% of marketers said influencers were open to becoming affiliates in 2024. In 2025 that fell to 26%. When you reach out to established creators, offer a flat fee plus commission rather than commission alone.
• Running the affiliate program on autopilot. In our affiliate research, marketers who were "very involved" with their affiliates had 71.5% of them active. "Very hands-off" marketers had 10%. Affiliates post when you give them a reason to, so check in every month with something new to share. For weight loss, that could be a new recipe to film, a seasonal reset like New Year or summer, or a new app feature to try.
• Sending affiliates old product. 93% of marketers gift products to affiliates, but almost 30% don't refresh them when something new launches. Send every new app feature, recipe set or program change to your creators before it launches.
• Letting creators promise results. A post that says "down 30 pounds" tells followers to expect the same, and if that isn't typical, the FTC expects the post to say what people usually get. Posts about prescription medication have their own rules on risk information. Give creators approved wording and the exact disclaimer to add, and check every caption before it goes live.

FAQ

How much does weight loss influencer marketing cost?

It depends on platform, following and engagement. Micro-influencers often work for free product plus a fee in the low hundreds per post, or an affiliate commission. Larger creators charge more. Many brands start with gifting plus commission to test fit before committing to flat fees. To estimate what a specific creator is likely to charge, drop their handle into our free Instagram influencer pricing calculator.

Which platform is best for weight loss influencer marketing?

Instagram carries most weight loss creator work, and 199 of the 248 sponsored posts we analyzed for the five most-searched weight loss brands ran there. YouTube matters too: all 49 of Noom's posts were YouTube sponsorships, and in our survey, marketers rated TikTok videos the highest-performing deliverable (53.2%).

Which weight loss brands use influencer marketing?

WeightWatchers, Mochi Health, Noom, MyFitnessPal and Herbalife are the most-searched weight loss brands in the US, and all of them run active creator programs. See the breakdown above for who each one works with.

Should weight loss brands work with micro or macro influencers?

It depends on your goal. A launch chasing awareness leans bigger, a conversion play leans smaller and more trusted. In the weight loss posts we analyzed, creators under 50k followers got more than one and a half times the likes relative to their audience size, so most brands should build their base with micro-influencers (10k–50k followers) and add bigger names for launches.

How do I measure weight loss influencer marketing?

Track sales per creator with unique links and codes, then compare revenue against what you paid (fees, product and commission). Our engagement rate calculator and fake follower checker help you vet creators before you spend, and our guide to influencer marketing ROI covers the full calculation.

Start your weight loss creator program

Find creators, manage relationships, pay them in 180+ countries and 36 currencies, and track every sale through Shopify – all in one place, with no fees taken out of creators' pay. Try Modash free, no credit card required – or browse the top weight loss influencers to see who's already out there.