Is your vegan food really vegan? We pull out all the stops to test 17 LA area vegan restaurants for non-vegan ingredients, and to find out why seven of them failed miserably.
NOTE: Please see update regarding Green Leaves Vegan here
UPDATE: Please check out the follow-up post from today when you’ve read this. THANKS.
From Pure Luck to Green Leaves, Vegan House to Vegan Plate and Rosemead to Taipei we pull back the covers on the seedy world of vegan restaurants, and an international supply chain that pumps eggs and milk into our supposedly vegan food on a daily basis.

Vegan Quesadilla from Green Leaves Vegan tested “Overload” for casein, a milk protein.
Surely, a vegan restaurant is safe to eat at if I’m a vegan?
Really? Regular readers of quarrygirl.com will recall us publishing an email and photos from “Mr. Wishbone” detailing the contents of a dumpster at LA Vegan Thai with non-vegan ingredients plainly visible, and presumably used as ingredients in the food (pancakes in this case).
After we published Mr. Wishbone’s findings, several people wrote in with stories about potentially non-vegan ingredients being sighted in vegan restaurants, and one particular thread on the quarrums “Vegan Dirt” began to get rather busy, with accusations flying here and there about shrimp paste being spotted in some restaurants, and “vegan cheese” that looked and tasted exactly like dairy-based cheese being served in others.
While this blog hasn’t hesitated to call out non-vegan “vegan donuts” and non-vegan “vegan cheese pizzas” in the past, we can only make information public that can be empirically proven. Accusations and reports of non-vegan ingredients and suspect food handling (of which we get many) have to stay smoldering in our Deleted Items folder laying in a morass of uncertainty. Or so we thought until a couple of weeks ago, when Mr. Wishbone emailed again, and requested a meeting: “I have some knowledge of the food industry, and I think we can prove whether or not a food item contains certain non-vegan ingredients. I can tell you, though, it’s not going to be easy or cheap. If we meet I’ll share my ideas”. Intrigued, and under the strictest secrecy, we met up for lunch.
The Plan
During the meeting, Mr. Wishbone outlined an ambitious plan that would enable us to test for common non-vegan ingredients (eggs, casein [a component of milk], and shellfish) in a multitude of menu items from local vegan restaurants. The plan would be a logistical, financial and time-sucking nightmare but, if done properly, and to scientific testing standards, it would be a ground-breaking and highly reliable indicator of just how “pure” food from vegan restaurants really is. Here’s an outline of the plan:
- Locate a facility that has no traces of egg, casein or shellfish in which to perform the advanced tests
- Purchase anti-contamination equipment including industrial sterilization supplies, lab coats, uncontaminated bags, swabs, razor blades, gloves and floor coverings
- Obtain highly restricted industrial food testing “kits” only available to the food manufacturing industry
- Develop a regimented process to test each food item with the highest standards of inter-test cleanliness, ensuring that absolutely no food particles from one food item contaminate another
- Select a diverse set of menu items from 100% vegan-only restaurants throughout LA (with one exception, see later)
- Order the food for carry-out, and seal it in an airtight bag in its original packaging either inside, or very close to the point of purchase
- Transport the food items to the testing facility intact and sealed, and perform the tests within 48 hours of purchase, keeping them refrigerated until immediately before the test
- Develop a strict bracketing control, with a thorough analysis of the testing facility and equipment before testing: A negative control to ensure no pre-existing contamination, and a positive control test on a known-positive food product (containing all three target non-vegan items) to ensure that the tests do indicate positive results
- Conduct the test in absolute secrecy to ensure that no restaurant would know they were providing samples, and pose as regular customers ordering take-out food in a normal way, with no disclosure that the items would be used for a test
So, we divided up the work between us, and dedicated a Friday evening, Saturday and Sunday as well as over $1,000 of our collective money to pulling off the most extensive scientific test that we know of to find out, once and for all, if samples of restaurant food are vegan or not.
The Story
Here’s the story of what we did, how we did it and the surprising results….
Read the rest of this entry »