Boiled eggs

For weight loss, literally as many as will fit in your calorie goal, if you want to.

For weight loss and nutrition, as many as will fit in your calorie goal while ensuring you get enough protein (which the eggs will help), enough healthy fats (eggs have saturated fats; you'll probably want some nuts, seeds, olive oil, avocados, or that sort of thing for polyunsaturated/monounsaturated fats), and lots of varied, colorful fruits and veggies for fiber and micronutrients.

Medically speaking, if you have an unusual medical condition like familial hypercholesterolemia that requires you to limit dietary cholesterol or some other component of eggs, you might need to limit egg consumption. Your doctor can refer you to a registered dietician for advice, in that case. (For most people, this isn't going to be a big issue, at a practical level of egg intake.)

Moreover, exercise can be used to earn even more eggs.

But I suspect you didn't intend to eat only eggs, or the nearest thing to it, right?

Best wishes!

I had nine large hard boiled eggs today, mostly in the form of salad sandwiches. I'm kind of sick of them now but I didn't feel like shopping and it's the only protein source I had unless I wanted smoothies all day. The first eight were super delicious, but number 9 kind of put me off them, lol. So, I would say eight is my max.