Sweetgreen is leaning further into health-focused marketing as restaurant chains compete for diners who want convenience, customization and fresher ingredients. The Los Angeles-based fast-casual chain is now turning a viral personal food experiment into a branded campaign, asking 30 people to spend 30 days eating only from Sweetgreen’s menu.
Sweetgreen formalizes a social-media challenge around 30 participants
Sweetgreen has opened applications for what it calls the “30 Days of Sweetgreen Challenge,” a program that is expected to run from September 14, 2026, through October 13, 2026, according to the company’s published terms and conditions. The company said it plans to select 30 participants, each of whom will be expected to eat only Sweetgreen meals during the challenge period and post approved content to social media. The campaign follows creator Tim Donohue’s self-directed 25-day Sweetgreen diet, which the company highlighted on its website and executives discussed publicly.
Under the rules posted by Sweetgreen, selected participants will receive a $700 credit in their Sweetgreen account each Monday during the challenge period to cover two meals per day for that week. The company said any spending above that amount would be the participant’s responsibility, and unused funds would be forfeited. Sweetgreen also said participants who complete the challenge and meet content deadlines will receive an additional $500 account credit, with tax forms required because the compensation is treated as taxable income.
Industry publication Nation’s Restaurant News reported that Donohue said he spent $996.91 on 50 bowls and 20 sides during his 25-day experiment, while losing about eight pounds and saying he felt lighter. In that report, CEO Jonathan Neman said the broader challenge is meant to show how Sweetgreen’s food can support daily life and health goals. Sweetgreen’s landing page similarly frames the promotion as an outgrowth of Donohue’s experience.
The customer impact is national, but store-by-store participation remains unclear
The Sweetgreen challenge is national in concept, but the company has not released a state-by-state or city-by-city list showing where selected participants will be based. Sweetgreen’s public materials describe an application process and challenge terms, but they do not identify how many participants will come from California, New York, Illinois or any other market. The company also has not published a list of stores expected to see challenge-related content creation or increased order volume.
That leaves several local details unconfirmed. Sweetgreen has not said whether applicants will be clustered in major metro areas where it already has dense store coverage, or whether it wants broad geographic representation. The company also has not publicly outlined whether menu availability differences by store could affect what participants are able to order over 30 days.
What is confirmed is that participants must be at least 18 years old, in good health, have active social accounts and agree to produce content during the campaign, according to Sweetgreen’s terms and challenge page. The company is positioning the effort as both a meal program and a marketing initiative, with participants serving as creators documenting the experience in real time. For customers, that likely means the campaign will be most visible online first, with any local effect varying by where the selected participants live and order.
The campaign fits Sweetgreen’s effort to reinforce its health-and-lifestyle identity
The challenge arrives as Sweetgreen continues to present itself as more than a salad chain, emphasizing menu variety and a broader lifestyle brand identity. Nation’s Restaurant News reported that the company has been trying to improve sales trends after a weak first quarter and that executives viewed the campaign as a way to reinforce Sweetgreen’s association with fresh ingredients and feeling better after eating. The same report said a summer cyclospora outbreak made some consumers wary of lettuce across the category, though Sweetgreen was not implicated.
Sweetgreen’s own challenge page reflects that broader positioning. The company points applicants directly to the Donohue story and invites them to consider whether they can eat Sweetgreen twice a day for a month. That framing suggests Sweetgreen is using a consumer-generated stunt to make a larger point about repeatability, menu breadth and confidence in its food quality.
For customers and prospective participants, the practical takeaway is straightforward. The challenge is expected to begin on September 14, 2026, with weekly credits deposited on Mondays, and completion depends on both sticking to the food rules and meeting Sweetgreen’s content requirements. As of now, the company has confirmed the program structure and compensation, but it has not published the final participant roster or a full geographic breakdown of where those 30 people will be located.