How Bulletproof Coffee Became a Silicon Valley Weight Loss Trend

If you’ve ever wondered whether adding butter and oil to your coffee could help you lose weight, boost focus, or replace breakfast, you’re not alone. The idea seemed bizarre—until it took over Silicon Valley. But where did this trend come from, and does it have real science behind it?

The short answer: yes, it’s real—but with caveats. Bulletproof Coffee, a high-fat coffee drink with butter and MCT oil, was created by tech entrepreneur Dave Asprey after his 2004 trip to Tibet. He claimed it gave him energy, reduced hunger, and helped him lose 100 pounds, all while providing 460+ calories per serving. The recipe: 1–2 cups of black coffee blended with 1–2 tablespoons of grass-fed unsalted butter and 1–2 tablespoons of medium-chain triglyceride (MCT) oil (like coconut-derived MCT), creating a creamy, latte-like drink designed to induce ketosis and replace a meal.

The Accidental Discovery in Tibet

In 2004, Dave Asprey, then a cloud computing expert, went to Tibet to study meditation. His plan changed after trying yak butter tea—locally known as po cha. Despite the high altitude, he felt energized and clear-headed. “I realized it wasn’t the meditation—it was the butter tea,” Asprey recalled. The experience stuck with him, and upon returning to the U.S., he dedicated years to recreating its effects without the tea or sugar.

Asprey, who once earned an 'A' in a college course studying espresso’s effects, focused on coffee as the base. Over 15 years, he invested $300,000 in personal research, including 3D brain metabolic scans, aiming to eliminate fatigue, lose weight, and enhance cognitive performance—all tied to dietary fats.

The Birth of Bulletproof Coffee

After years of experimentation, Asprey developed a coffee blend that mimicked the richness and effects of Tibetan butter tea. His formula included:

• 1–2 cups of black coffee
• 1–2 tablespoons of grass-fed, unsalted low-moisture butter (low-fat, low-salt as specified)
• 1–2 tablespoons of medium-chain triglyceride (MCT) oil (initially tested with coconut oil as an alternative)

The result was a frothy, latte-like drink with a smooth mouthfeel. He named it “Bulletproof Coffee” and published the recipe on his blog in 2009. The drink was marketed as a high-fat, no-sugar, no-carb breakfast replacement that could trigger ketosis—a metabolic state where the body burns fat for fuel—and improve mental clarity.

According to Asprey, this routine, combined with other healthy habits, boosted his IQ by at least 20 points. While experts like Marjorie Nolan Cohn of the American Nutrition Association noted that the science on mental sharpness remains unproven, they acknowledged that “fats are indeed beneficial for brain function.”

Viral Spread and High-Profile Fans

Bulletproof Coffee quickly gained traction among celebrities, tech executives, and health enthusiasts. Hollywood actress Shailene Woodley called it “one of humanity’s greatest achievements.” Talk show host Jimmy Fallon discussed it with Maya Rudolph, and Silicon Valley investor Dan Scholnick reportedly traveled with a portable Aeropress, electric milk frother, custom coffee beans, and Bulletproof-specific butter and MCT oil to make the drink at 30,000 feet.

Scholnick claimed the drink kept him energized during flights and even tried to convince his company’s CEO to invest in Asprey’s project. The recipe was free, but Asprey built a business around it. By 2015, his company had grown to 20 employees, selling branded coffee beans, sleep mats, heart rate monitors, and an $895 brain-focus device. Sales reportedly grew seven- to eightfold since 2011.

The drink also gained traction in physical coffee shops. Naomi Seifter, owner of Austin’s Picnik Coffee, said she discovered Bulletproof Coffee through her mother and introduced it at her shop. Initially, customers ordered it black, but over time, the buttery version became a bestseller, putting the café on the map.

How to Make Bulletproof Coffee: Step-by-Step

To replicate the original Bulletproof Coffee recipe at home, follow these steps:

• Brew: Prepare 1–2 cups of black coffee using your preferred method (e.g., pour-over, French press, or espresso blend for a stronger base).
• Add Fat: Blend in 1–2 tablespoons of grass-fed, unsalted low-moisture butter (clarified butter or ghee can also work).
• Add MCT Oil: Blend in 1–2 tablespoons of MCT oil (derived from coconut or palm kernel oil; start with a smaller amount if sensitive).
• Blend: Use a blender, milk frother, or immersion blender to mix until the coffee becomes creamy and frothy, resembling a light latte.

The final drink should contain around 460+ calories, primarily from fat, with negligible carbs or protein—making it suitable for ketogenic or low-carb diets.

Commercial Availability and Expansion

Bulletproof Coffee became widely available in Silicon Valley cafes, including Picnik Austin. While some customers initially resisted the butter and oil, the drink eventually became a top seller. Asprey planned to open his own Los Angeles-based café in 2015, citing the area’s density of Bulletproof fans. He cited high San Francisco rents as a reason to launch in LA instead.

He also intended to develop a ready-to-drink version of Bulletproof Coffee and a supplement called “Unfair Advantage,” a mitochondrial energy booster priced at $60 per month. Asprey’s broader goal remained to create products that enhanced energy, focus, and weight loss—culminating in a book he planned to write, tentatively titled The Better-Than-Human Diet.

Frequently Asked Questions

What is Bulletproof Coffee?

Bulletproof Coffee is a blended drink made with black coffee, 1–2 tablespoons of grass-fed unsalted butter, and 1–2 tablespoons of medium-chain triglyceride (MCT) oil, typically yielding 460+ calories. It was created by Dave Asprey as a high-fat, no-sugar breakfast alternative to induce ketosis and enhance mental clarity.

Who invented Bulletproof Coffee?

Bulletproof Coffee was invented by Dave Asprey, a former cloud computing expert, after his 2004 trip to Tibet where he experienced increased energy from drinking yak butter tea. He developed the coffee recipe after years of research, launching it in 2009.

Does Bulletproof Coffee help with weight loss?

Bulletproof Coffee is high in fat and calories, and when used as a meal replacement, it may promote ketosis and reduce hunger. However, it is not a guaranteed weight loss solution and should be part of a broader dietary strategy.

What is MCT oil and why is it used in Bulletproof Coffee?

MCT (medium-chain triglyceride) oil is a type of fat that metabolizes quickly, providing fast energy. It is often derived from coconut or palm kernel oil and is used in Bulletproof Coffee to enhance ketosis and boost mental energy.

Is Bulletproof Coffee safe to drink daily?

Bulletproof Coffee is generally safe for most people when consumed in moderation, but its high saturated fat and calorie content may not be suitable for everyone. Consult a healthcare provider if you have dietary concerns or medical conditions.

Can I make Bulletproof Coffee without a blender?

While a blender creates the best frothy texture, you can make Bulletproof Coffee without one by stirring vigorously or using a milk frother. The mixture may be less creamy but still effective.

Recommended FrontStreet Beans for Fatty Coffee Blends

For making Bulletproof-style coffee, FrontStreet Coffee’s Ethiopia Guji Natural offers bright fruit and floral notes that complement the rich fats, while Yirgacheffe Washed provides a clean, citrusy contrast. Both single origins highlight the clarity of flavor even when paired with butter and MCT oil. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.