Consumer health and wellness · Personalized nutrition
LemonBox
A vitamin subscription built by a Chicago Booth MBA who wanted to send his family in China something better than what the pharmacy sold, now positioned by its backers as an AI driven nutrition company.
A shopping list from home
Derek Weng spent eight years in the United States, and every time he flew back to China, friends and family handed him a list. Maternity items, cosmetics, vitamins. Many Chinese consumers still hold to the idea that imported goods are simply better made. Weng had studied at the University of Chicago Booth School of Business, earning an MBA and MPP in 2016, then worked at Walmart in Silicon Valley, where he led cross border ecommerce development between the United States and China.
He also could not answer the questions his relatives asked him. “They asked me a bunch of questions about what kind of products they needed to take, but I’m not a dietitian or an expert,” he told the University of Chicago’s Polsky Center in 2021. That gap became the first version of LemonBox, a consultation platform pairing users with nutrition data rather than a product catalog.
The problem it set out to solve
China’s vitamin and supplement market has long been dominated by large multinationals and multi level marketing firms such as Amway, sold through pharmacies at a steep markup. Weng argued the underlying product was not expensive to make. “But vitamins aren’t that expensive to produce. Amway and the likes spend a lot on marketing and sales,” he told TechCrunch in 2020, pointing to a 30 count basket of B complex tablets priced at 35 yuan on LemonBox against roughly 57 yuan for the same quantity of an Amway product sold on JD.com. Layered onto price was a trust problem: food and supplement safety scandals had left many Chinese consumers skeptical of domestic brands and drawn to cross border ecommerce instead.
Founders
Weng brought an early version of LemonBox to the Polsky Center’s 2017 New Venture Challenge while still working at Walmart, running the startup on the side. “The NVC gave me a framework of what it takes to become a real business,” he said. In 2018 he left Walmart, moved back to China, and took LemonBox full time, the year the company says it evolved from a consultation service into a company that also sold its own products. That same year LemonBox joined a Y Combinator batch and raised a reported 2 million dollar seed round, funding that went into a Silicon Valley facility and its first supply chain. The company itself, through its current Y Combinator profile, dates its founding to 2016 and Silicon Valley, a claim independent reporting from that period does not fully square with, since TechCrunch and the Polsky Center both tie the product launch and full time commitment to 2018.
Weng designed LemonBox around a WeChat mini program rather than a website, a choice he described as a lesson in how different Chinese and American ecommerce are. “In China, it’s pretty significantly different. First off, not a lot of people use web browsers, but everyone is on mobile phones,” he told TechCrunch. “There’s a lot of learning to be done. It’s a very humbling experience.”
Funding and growth
Chinese language coverage traces four rounds before any English language press picked up the story: a seed round in July 2018 from Y Combinator and Lightspeed China (referred to in Chinese as 光涧实验室), an angel round in October 2018 from unnamed Silicon Valley investors, a pre A round of 2.5 million dollars that closed in December 2020 led by Panda Capital with Y Combinator following, and a Series A described by 36Kr and Brandstar as close to 10 million dollars, closing in October 2021 and led by an unnamed domestic fund with Panda Capital, SCRUM, Partech and SCMAdvisors following. By mid 2021, KrASIA reported LemonBox had reached over 1 million users in China. The company now says it has served over 10 million users globally, a figure attached to its website with a September 2025 data note, though no independent source has re counted the user base since the 2021 figure.
What is proven, and what is still claimed
| Evidence | What the record shows | Source type |
|---|---|---|
| Founding story | Company says founded in Silicon Valley in 2016. TechCrunch (2020) and the Polsky Center (2021) date Weng taking the company full time, joining Y Combinator, and launching its first products to 2018. Tracxn separately lists a 2017 founding year and a Beijing headquarters. | Conflict |
| User base | 10 million plus users served, stated on the company website with a September 2025 data note. KrASIA reported over 1 million users in China as of March 2021. No third party audit of either figure was found. | Company stated |
| Funding total | Reported rounds (seed 2018, angel 2018, 2.5 million dollar pre A in 2020, near 10 million dollar Series A in 2021) sum to well over 12 million dollars in independent Chinese coverage. Aggregator Tracxn instead lists total funding at 4.5 million dollars, a figure its own per round numbers do not add up to either. | Conflict |
| Named investors | Y Combinator, Panda Capital and Partech appear across multiple independent funding reports from 2018 to 2021. Bessemer Venture Partners appears only on the company’s own Y Combinator profile; no funding announcement naming Bessemer was found. | Gap |
| US regulatory record | No FDA warning letter or import alert naming LemonBox was found in FDA’s public enforcement databases. Dietary supplements are not FDA approved before sale, so absence of action is not the same as a clean bill of health. | Gap |
| SEC filings | No Form D filing under the LemonBox name, or any EDGAR full text search hit naming LemonBox as an issuer, was found. That is consistent with a company built to sell into China through a WeChat mini program and Chinese marketplaces rather than raise US registered securities. | Public record |
The clearest pattern here is that LemonBox’s own story, repeated on its Y Combinator profile, has drifted from the version that independent reporters captured while the rounds were actually closing. The 2016 Silicon Valley founding date now attached to the brand sits awkwardly next to a 2018 story, told to two different outlets in two different years, of a side project that only became a company once Weng quit Walmart and moved back to China.
What to watch
- Whether LemonBox or an investor ever names the lead of the October 2021 Series A, still described only as an unnamed domestic fund.
- Any disclosed financing since 2021, or confirmation of Bessemer Venture Partners’ involvement.
- Independent verification of the 10 million user figure now on the company’s site.
- Whether the “AI generated nutrition” positioning on its current Y Combinator profile reflects a real product change or a rebrand of the same recommendation questionnaire described in 2020 and 2021.
In their words
“But vitamins aren’t that expensive to produce. Amway and the likes spend a lot on marketing and sales.”
Derek Weng, founder and CEO, to TechCrunch, 2020 · Independent
“There’s a lot of learning to be done. It’s a very humbling experience.”
Derek Weng, to TechCrunch, 2020 · Independent
“I was fascinated by the success of D2C brands like Warby Parker, and Blue Apron, which used e-commerce to capture specific product verticals. I started to think, ‘how can I bring this D2C concept to my homeland?’”
Derek Weng, to KrASIA, 2021 · Independent
“Chinese people are very, very health cautious. They are always talking about what is good for your health and for your body,”
Derek Weng, to KrASIA, 2021 · Independent
“Our mission is to use data to empower nutrition science and deliver that service to China. The whole purpose is how can we make the algorithm as close as to the real-life person consultation.”
Derek Weng, to KrASIA, 2021 · Independent
“The NVC gave me a framework of what it takes to become a real business,”
Derek Weng, to the Polsky Center, 2021 · Independent
“We are now a leading brand in the personalization vitamins industry in China, so this is a huge opportunity,”
Derek Weng, to the Polsky Center, 2021 · Independent
Related companies
Sources
- IndependentYC backed LemonBox raises 2.5 million dollars bringing vitamins to Chinese millennials
- IndependentLemonBox is personalizing nutrition for Chinese millennials
- IndependentLeading the Personalized Supplement Market in China, NVC Alum LemonBox Raises 2.5 Million Dollars to Expand Direct to Consumer Business
- IndependentLemonbox Raises 2.5 Million Dollars in Funding
- IndependentDTC personalized nutrition brand LemonBox raises nearly 10 million US dollars in Series A funding
- IndependentHow are the first batch of projects YC invested in China doing? LemonBox has completed a tens of millions RMB angel round
- Independent36Kr exclusive: DTC nutrition brand LemonBox completes near 10 million US dollar Series A, building out its full ecosystem
- IndependentPersonalized vitamin DTC brand LemonBox raises several million US dollar pre A round, led by Panda Capital
- IndependentLemonBox company profile
- CompanyLemonBox: AI-generated personalized nutrition solutions, built for you daily
- CompanyLemonBox homepage
Profile researched and written by Healthcare Discovery. Last updated September 29, 2026.
