Did Cai Aga's Team Copy Again? Female Doctor Accuses Them of Stealing Protein Powder Formula, Files Lawsuit with 5 Points: 'They Knew Exactly What They Were Doing'

Million-subscriber YouTuber Cai Aga has recently been embroiled in controversy, following allegations that his wife Er Bo's parenting brand 'hahababy' copied a Japanese brand. Now, obesity specialist Dr. Wang Tzu-yun has accused Cai Aga's team of plagiarizing her protein powder formula. Dr. Wang posted a detailed Facebook statement listing five key points, claiming her life's work—the '4+2R Metabolic Diet' and its accompanying protein formula—was 'systematically plagiarized' by Cai Aga's team, a situation she describes as 'a bone stuck in her throat.'

Dr. Wang explained that in 2022, she collaborated with Cai Aga's team on an advertising shoot, during which over ten members of his studio followed her '4+2R' diet method under her guidance for several months, achieving remarkable fat-loss results. Unbeknownst to her, the team filmed the entire process as a documentary and uploaded it to YouTube, where it quickly surpassed one million views, significantly raising public awareness of her diet method.

While Dr. Wang expressed gratitude for the exposure, she raised concerns in 2023 when a company named 'Sunflower Sprout' launched a product called 'Bi Yi Bi Protein Powder.' Its core formula—'isolated soy protein + isolated whey protein + prebiotics'—closely resembles her own MNT protein powder. While similar imitation products exist, Dr. Wang emphasized that additional factors make this case particularly serious.

She outlined five major issues:

First, 'Sunflower Sprout' is managed by 'Yenen,' a former employee of Cai Aga, who later made a high-profile return to Cai Aga's studio in 2024.

Second, Yenen/Sunflower Sprout created a LINE group named '4+2R Buddhist-Style Homemade Weight Loss Group,' attracting over 1,000 members interested in weight loss and the 4+2R method. To this day, many still believe the protein powder sold in the group is the same as the one used in Dr. Wang's clinic.

Third, the group teaches a simplified version of 4+2R and profits heavily from selling protein powders and other supplements. However, they explicitly state they take no responsibility if users experience health issues, telling them instead to 'go find Dr. Wang for help.' Dr. Wang called this attitude 'treating health and safety as a joke' and said this is her biggest concern.

Fourth, Cai Aga and Er Bo frequently promote or organize group buys for Bi Yi Bi protein powder. While Dr. Wang cannot confirm whether they have invested in the company, she questions the true nature of their relationship with Sunflower Sprout.

Fifth, the group was initially renamed 'Buddhist-Style Homemade Weight Loss Group,' but now openly uses '4+2R | A Weight-Loss Lifestyle for Those Who Don't Want to Lose Control,' directly using her registered trademark to attract customers. After Dr. Wang posted about this on Threads, the administrator 'Old Sprout' immediately removed '4+2R' from the group name, proving their deliberate misconduct.

Dr. Wang stated this issue has long troubled her, and combined with the recent plagiarism scandal surrounding hahababy, she suspects the team is leveraging their massive fan base to replace original brands. She also noted that during promotions, they deliberately avoid using the term '4+2R' to evade legal liability. Additionally, influencer 'Goddess of Minced Meat' mentioned in January that those seeking the same formula at a lower price should 'go to Cai Aga's Sunflower Sprout—it's much cheaper.' After gathering extensive evidence, Dr. Wang is now certain of the plagiarism and has officially engaged a lawyer to sue Yenen and Sunflower Sprout for trademark infringement.