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What the heck do you put butter in your coffee? Silicon Valley startups receive $19 million in financing with this idea

Published: 2026-08-25 Author: World Gafei

Last Updated: 2026/08/25, Professional baristas follow Coffee Workshop (Wechat official account cafe_style) Dave Asprey, who is known for encouraging Silicon Valley executives to add butter to his specialty coffee, recently raised another $19 million. Asprey and his lifestyle company Bulletproof 360 claim to remove fungal mycin from coffee, which is a kind of mold. Eat it.

For professional baristas, please follow the coffee workshop (Wechat official account cafe_style)

Dave Asprey, who is known for encouraging Silicon Valley executives to add butter to his specialty coffee, recently raised another $19 million.

Asprey and his lifestyle company Bulletproof 360 claim to remove fungal from coffee, a mold that makes people sick when eaten.

Asprey says 75 per cent of other coffee brands contain large amounts of mycomycin, which invades the brains and bodies of US technology industry leaders all the time. However, for $18.95, you can buy a bag of Asprey's "upgraded" specialty coffee, which is absolutely fungal-free.

But Asprey's publicity may be untenable. Mycomycin exists widely, including grains, coffee and so on. If the intake is too large, it is bound to be harmful and even cause cancer. However, most coffee companies in the world know this and remove it through wet treatment.

Bulletproof says this is not enough, and they have some special processing technology. However, despite the company's strong publicity, some people said that fungal mycin was found in Asprey's coffee.

Americans who drink more than four cups of coffee a day still have fungal levels below the standard, according to the National Institutes of Health. The National Institutes of Health stopped the study because the content of mycomycin was so low after the normal baking process that the National Institutes of Health thought it was not necessary to continue. Therefore, it can be said that mycomycin is not a particular concern.

If you want to get loyal users in the health industry, you must have some excellence. Bulletproof's persuasive story lies in Asprey's own story. He spent 1 million dollars "exploring" his body, trying, failing, trying again and again, and eventually lost 100lbs. But seriously, any sales that encourage consumers to add butter to plain boiled water will probably get a lot of attention.

Although we don't know the company's specific sales figures, they seem to have convinced VCs. This round of financing is led by CAVU Venture Partners, followed by the original investor Trinity Ventures (who invested in Starbucks). Bulletproof received $9 million in previous round A financing, bringing the total to date to $28 million.

Asprey, which has just published a new book, plans to open more retail stores this year, starting in New York City. His two existing Bulletproof cafes are located in Southern California.

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