How can I lose 30 pounds? Want to start a low carb diet

I ended up in the Emergency Room 3x back in April, May & June for odd pain in my right side and by the 3rd ER visit I saw on my lab report that my Ketones were high. Well I didn’t feel like eating around all those times due to that pain in my right side and one week I actually wasn't eating hardly anything. I lost about 15 lbs without even trying. I read that a person can develop diabetic ketoAcidosis due to high ketones and that a person should go to the ER if they suspect their ketones are high, Well I was already there at the ER with unknowingly high ketones. I read when you aren’t a Diabetic (which I’m not a diabetic ) high ketones is caused by your liver breaking down fat for fuel for energy due to a person not eating enough carbs to sustain themselves. Symptoms of it (among other reasons) are stomach pain which I had while there in the ER as well. Everytime I ended up in the ER I was there for 6-8 hrs waiting for care and wasn’t eating. Granted I wasn’t hungry either because I was in pain although once the pain subsided I did try to eat. I have been wanting to lose weight but that is not a good way to do it and I didn't do it on purpose.

This is really an eye opening and informational video on diets and health. Kind of long at 51 minutes but well worth it.

This year I lost 42 pounds on the Mayo Clinic Diet Program.
It focuses on healthy eating, not "dieting," and weight loss is the natural result.
It is very adaptable to your tastes and lifestyle choices.