What side effects would those be Renee. I've done it over the years a few times, I have friends that live a lifestyle around it, (me as well atm) and I don't see any long term side effects. Most of us saw abnormalities in the first 2 weeks, but after the body switched to keto it went back to normal with a lot more energy, a lot less desire for food and fat going down in rapid rates.
Ofc you get exhausted mentally, I know my last cheating meal was 2 large pizzas, 8 slices of cheese cake and 2 beers, all eaten in the spawn of 20 minutes. Did not sleep that night from overeating

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Lots of BS materials on this topic on the net where most researchers confuse
diabetic ketoacidosis with
nutritional ketosis. Not to mention the claims about liver/kidney damage. Hey go research protein powders and amino acids and you'd find tons of negative/harmful effects of those too on the net, with little to non-existent evidence.