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Recently I've been finding this product in a supermarket. Does this mean 70/30 protein/fat? I tried to look this up online, no success.

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"Does this mean 70/30 protein/fat?"

Yes.

It's likely that they are rewording the protein/fat ratio since 70/30 is pretty shitty ground meat, especially if it's CAFO meat, where you'd want to avoid CAFO animal fat if possible to maintain a better Omega-3:6 ratio.

If you cook, I find 85/15 to 90/10 ideal for most general uses. Still, try to avoid the CAFO stuff if you can.

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Yes it's fat percentage by weight, and although there are trace carbs from glycogen in meat, the other 70% by weight is protein. BUT ... that protein part is high water content. So 100g of <30% fat contains roughly 30g fat, 70g lean but not 70g protein.

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In addition, I find the protein:fat ratio notoriously unreliable for ground beef, because of changes with cooking. Depending on whether I cook the ground beef alone and lose some of the fat to "pan losses" or throw the ground beef in with other ingredients to make a real dish, the fat seems like it can inadvertently be halved. – Kamal Mar 20 2012 at 15:53
So true Kamal, I usually use 80% as 70% is generally low quality but 80% seems to be quite nice. But I don't like greasy food so when I hear folks pouring drippings over their meat or leaving all the fat in a chili they get most of it I suppose, but I definitely drain some fat. So perhaps the cooked product is 85-90% for all I know. I've never gotten frying fatty beef in more fat! – Evelyn aka CarbSane Mar 20 2012 at 16:17

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