Keto/low carb diets are not what they seem. Short term use can be good for a person. Long term use that some doctors try to push on diabetes or Bariatric Patients or even kids with seizure disorders is what is harmful. I say this not only from a personal standpoint as I have damage to my heart caused from a low carb/keto diet that I was forced into by a previous doctor but also scientific research showing how long term use is bad for you.
For a type 1 diabetic ketones can end up being a bad thing. The state of ketosis is a mild form of DKA which could end up going badly if used over a prolonged period of time. These ketones build up in your blood stream and can cause damage to muscles and organs. It’s been shown that people who use keto diet whether Type 1 or not tend to gain all weight back within a year of using it whether or not they are still on a keto diet. The other thing is most of the weight that is lost isn’t fat like everyone thinks. It’s water weight. When in a state of ketosis for long periods of time instead of burning fat or getting rid of water you start to burn your muscles which causes damage including to your heart. You become extremely fatigued and enter into starvation mode which is basically a panic system for your body to start burning muscle instead of fat. It become harder to lose weight the longer you are on it as well.
Personally, I was on the keto diet after being pushed on to it by my then endocrinologist and nutritionist. I was on it a year and a half before I started noticing heart issues. It’s started with Postural Orthostatic Tachycardic Syndrome (POTS) and progressed to also being SVT (super ventricular tachycardia). I had my first ablation to fix Dec 21, 2009. It had to be redone because I didn’t realize it was the keto diet hurting me and I stayed on it. Also my A1C wasn’t coming down like they had hoped. After the second ablation I went off of the keto diet and was fine. I got pregnant with my son 2011. Had him and everything was good until Dec 2012. I went back on the keto to because again my nutritionist said go back to it and it will help especially just having a baby. I was all over and again my A1C continued to raise. Then started some other symptoms in Dec 2012. Three days before 12/21/12 I was put on a 30 day event monitor. I wouldn’t make it 3 days before I was called and told to go straight to the ER. I was running in the low 40s and dropping to 20 as well as pausing for 2-3 seconds at a time. I had my pacemaker placed 12/21/12 the supposed end of the world. It wasn’t until I went back to an old doctor of mine in the beginning of 2016 who is also Type 1 and a different nutritionist that we would put it together with my cardiologist that it was the keto diet I was pushed into that caused everything. Your heart is a muscle. Keto over long periods causes muscle damage. At any time I could have went into DKA and I actually did a couple of times not realizing why.
This is why I’m not only personally against keto but feel that it is harmful for scientific reasons as well.