Kate Beckinsale travels with grass-fed butter in her suitcase

- "I find [this Kerrygold Irish grass-fed butter] quite hard to get a hold of. If I'm going from one city to another I'll put some in my suitcase to make sure I have it. I'm the crazy person traveling with butter."

- She spreads butter over vegetables and uses it as a key ingredient in her morning, high-fat Bulletproof Coffee brew (low-mold coffee beans + unsalted, grass-fed butter + coconut oil extract).

- She recommends a higher-fat diet of "coconut oil and butter and things like that, obviously in moderation." When she was 24 filming Pearl Harbor, she and her mom commented on her skin looking old because she was put on a rigid low-fat diet.