... most of the triglycerides we use for activity come either from the food we eat- in other words, we use them before they're stored in our fat cells- or from the fat cells themselves. ... deck of cards. That's 21 grams of protein, roughly. Now picture a steak the size of two decks of cards- side-by-side, in the case of a sirloin; on top of each other, if ... you can think of They're also increasingly rare in the foods we eat, compared with the foods our ancestors enjoyed. To get them these days, you must either eat a lot of fish...