You would be fine, you would need extra electrolytes and water.
120g of protein per day
36g of carbohydrates per day.
15g of fat per day.
You would lose weight, you'd be running at a calorie deficit. Assuming you had fat to start with everything would be fine. The protein levels are sufficient to maintain your muscle mass
You probably get bored of that food pretty quickly.
some brain damage: malnutrition tends to aggravate or cause brain damage.
I'm a brain damage survivor: it sucks, it takes decades to undo ( neuroplasticity takes time to do rewiring ), and life is never going to be what it could have been.
That's basically the Atkins diet (Keto) without enough nutrition. It'll function like a very short, very uncomfortable, malnourished crash diet.
You'll spend the first two weeks craving carbs and sugars like your life depends on it. It's awful. After that "break in" period, the cravings mostly go away.
But that's not all. So much as lick a piece of candy or chew on some bread, and you'll get a large dopamine rush followed by carb-craving mode again. If sheer willpower and deferred rewards are at all a problem for you, this might feel like one of the hardest things you've ever tried to do.
Edit: now that I remember, my grandma tried a "cottage cheese and grapefruit" fad/crash diet back in the 80's. Turns out that one has been doing the rounds for almost a century. IIRC, it doesn't work since it's easy to underestimate how insanely difficult this is to do.
I have done something like this. You will feel like hell and depending how vitamin deficient you are you could end up in the hospital. When I did it I just bounced back within a few months so it was not worth it.
If you are trying to lose weight counting calories over a long period helped me lose about 50lbs. Just try to stay in weight loss range and exercise for 30 min a day to burn some calories
So I can't answer your question exactly, but, as many here know at this point, I have been suffering through an illness where I have not eaten any solid food since last August (please no medical advice). Before I got, with the help of doctors, settled on a liquid diet of 6 Ensures and 4 V8s a day, I lost 80 pounds- 260 to 180, I was dizzy and lightheaded all the time from the lack of electrolytes, and while I still don't have much energy and have to rest for a while after walking the dogs for half an hour, I couldn't even walk a couple of blocks.
That said, my blood panels show everything is normal, so I'm clearly not dying. It's not exactly a great quality of life, especially since our entire society is based around food in every conceivable way, but it is survivable. In fact, one good thing came out of it- I no longer have high blood pressure or high cholesterol, so I don't have to take pills to counteract those anymore.
Weight loss. I don't like cottage cheese but I do something similar with greek yogurt, eggs, and chicken breast. High protein is easy weight loss for me. Always listen to your body.
Since the comments indicate this is really a food budget challenge, let's talk about that. What is your monthly budget for food? Do you have any dietary restrictions you want to target?
The episode will begin with a dramatically narrated, HF is a <XYZ> years old <gender identifier>, and had <food> for a month! This is what happened next!
You'll probably get really sick of cottage cheese, for one. You'll also lose a lot of weight. In fact you'd be malnourished. Its only about 700-800 calories a day, which is far too few for almost anyone. The weight you lose won't just be body fat, you're body will start converting muscle tissue for energy. Thankfully this will be slightly mitigated by you're now quite high protein intake: 102g per day! Too bad you won't have energy to go to the gym on account of starving.
Also I bet you'll get diarrhea.
Don't do it, at least not for a full month. If you're gonna try it anyway then take multivitamins and drink a ton of water.