Eating just protein seems like it would be kinda bad for you.
yeah it's not just protein, it's mostly fat, some protein and a low amount of carbs (its not "no carb" its "low carb")
just out of curiosity could you describe maybe a weekly "routine" menu planning on that low carb thing? I've been meaning to do that for a while but somehow my imagination does not extend beyond two days as to what I would actually EAT.
breakfast: scrambled eggs (i like to put grated cheese in there) and a packet of bacon (140 g in sweden). sausages, a tomato or some mushrooms if youre feelin especially luxurious.
if youre tired of hot breakfast then the fattiest yoghurt with some good nuts and seeds (sunflower seeds, linseed, macadamia nuts, walnuts etc.)
for sammiches you can make some pretty nice "bread" based on eggs, cream cheese and various seeds and nuts. ya can look up recipes on the webz. some things you can bake with almond flour, almonds are really healthy.
lunch/dinner: any meat, fish or seafood with a rich, butter/cream/oil-based sauce and veggies. sorry you gotta use your imagination. instead of potatoes/pasta/rice you can do a lot of stuff with cauliflower, mashed cauliflower is almost exactly like mashed potatoes but even better. you can roast it in the oven too. broccoli too but i like cauliflower better.
i don't know i mean it's not really rocket science, all you do is you always use the fattiest version of everything, NEVER EVER any margarine or light/diet products, and change all your pasta/rice/potatoes to veggies. the hardest thing for most peeps is usually giving up bread.
SOMETHING I LIKE TO DO is chili with lots of chili and meat in it (get the fattiest minced meat, unfortunately there's nothing above 15% fat in stores nowadays) BUT be sure to use soybeans! soybeans are by far the best beans nutrition-wise. white beans, kidney beans, black-eye beans and the other usual kinds actually have rather a lot of carbs in them. soy beans are great stuff
snacks: if i get hungry between meals i like to eat some cheese or nice salamis. babybel cheese works if you gotta buy somethin in a hurry or some nuts. avocados are great, olives too
drinks: water, always. when you wanna get hammered, either red wine or hard liquor. beer has a lot of maltose in it so it's technically not allowed but I DONT CARE BECAUSE BEER RULZ DA WORLD
ALWAYS USE REAL BUTTER
BE SURE TO USE OLIVE OIL OR RAPESEED OIL (don't use sunflower or corn oil etc, they are not good for you. too much omega-6)