So, ever since my first dose of the covid vaccine, my body doesn't process sugars as effectively as it used to. I have had to adjust my insulin dosaging as well as my insulin tolerance levels.  Before the vaccine, I would give 1 unit of fast acting insulin for every 10 carbs. through out the day. In the morning when I would wake up I would give 1 unit of insulin every 9.5 carbohydrates.  After the vaccine, the 2nd dose made the symptoms worse. I now give 1 unit of insulin for every 9 carbohydrates for my first meal. For the "lunch" i give 1 unit of insulin for every 10 carbohydrates. and for the evening, after about 11 hours of being awake, I have to give 1 unit of insulin per 7.8 carbohydrates. When I sleep. My insulin basically becomes non-active and I often wake up with high glucose levels.  My daily dose of toujeo remained at 23 units 1x a day. Below is the adverse events I had in more detail. The first week was just like the 2nd week, but the 2nd week was worse. This was taken from my social media page where I thought to catalogue the events. For the first 7 days I had moderate to large ketone levels.   This Will Update Regularly until the 10/28 Disclaimer: This is not medical advice just my observation and the steps that I took after receiving the Moderna Vaccine. If you or anyone you know has type 1 #diabetes and gets the #Moderna vaccine. Ensure they are vigilant with their glucose levels, #ketone levels, and food. I got the first dose about 2 weeks ago, and I've had trace amount of ketones on a regular basis. At least 6 days out of the 14 days. Prior to the vaccine, I would only have ketones 1x or 2x a  year. My A1c last checked was 6.1 (a couple weeks prior to 1st dose of vaccine), and 6.5 prior to that. Edit: I want to add that my lifestyle hasn't changed in anyway prior to or after the first dose of vaccine that would've caused me to have higher occurrences of ketones. Update 1:  after 14 days my #ketoneLevels were back to normal, meaning negative every time. UPDATE 2nd Dose #Moderna Received 10/14/2021 After 12 hours, I now have #ModerateKetone levels. Day 2:  I experienced a fever of ~100f, and body ached. When I woke up this morning. I think the fever is out of my system. My body doesn't hurt as much. I woke up with my glucose levels @ 63. When I went to the restroom to check my ketone levels it showed trace amounts despite my low glucose levels which is really unusual. For lunch I ate out at restaurant. Within 10 minutes of finishing my meal I checked again. My ketone levels were moderate. Confirms my suspicions that I'll likely be on a jello diet for the next 14 days. Even food with "0 sugar, but had Sugar Alcohols" caused my ketones to increase. Confirmed, not all sugar free products will help eliminate Ketone levels. Today, I will eat mostly jello and other foods that has 0 sugar and I will ensure that there isn't any sugar alcohols. I'll update again once I test it. Day 3: I no long have a fever or body aches. My fever also never got higher than 100.2 on Day 2. I'm still having issues with producing ketones with nearly everything I ate. I tried drinking #powerade but it did not eliminate the ketones. #gatorade is the clear choice for me as it always helps to quickly eliminate any ketones that are produced. Even just eating a measly 11g carbohydrates caused trace amount of ketones. Day 4:  I started to eat only pistachios and jello. I'll occasionally have to eat something with a bit more carbs to raise my sugar, but when I do it causes some ketones to appear. Hopefully in 10 days everything will be back to normal. By the end of the day, trace amounts of ketones still appeared. I did some research and it's possible ketones developed even though my glucose stayed around 110 all day due to lack of appropriate caloric intake. Went from over 2000 to less than 1000. Day 5:   Woke up to small amount of ketones. Glucose dropped so I ate something to raise my glucose to 146. I had Moderate levels of ketones. After drinking at least 24 oz of water per hour. The ketones still did not get flushed out. I got really hungry and said "Screw It" decided to eat 50 carbs and gave a large enough insulin injection for it. Larger than normal since ketones reduce insulin effectiveness. After about an hour, I checked my ketone levels again. First check was trace amounts, the Second check was negative. Makes me curious. I can only assume this happened because even though I had consumed less carbohydrates the day before, I never had to give an insulin injection other than my Toujeo. Thus ketones developed from lack of insulin even though I didn't necessarily need an injection for the food I consumed on Day 4. Further experimentation/observation is needed. Day 6:  Woke up with glucose of 76. The ketone strips wasn't quite negative and it wasn't quite trace amount either. Since I had potentially a trace amount of ketones, I gave a tiny larger injection than I normally would and then I ate some cereal, my typical breakfast, and I checked again. My ketones were now at small. This is an improvement, as the first couple of days no matter what I ate it would've been moderate ketone levels. I started to eat regular meals like I did before covid. My ketones didn't reach about small amounts. Day 7:  Woke up with no ketones this morning. This is the first morning since I've taken the moderna vaccine that I've had no ketones. I've continued to eat my meals like I regularly had prior to the vaccine. Larger dosage of insulin was no longer necessary. Seems like this may be the turning point of the complications I've had. At one point I had trace ketones due to a in irregular glucose spike, but no other issues. Day 8 to 13: No ketones. Having to adjust my dosage per 10 carbohydrates on injection until I find a sweet spot again. Sugar is currently running slightly higher than it would be prior to the vaccine. Day 14:  Basically everything has resumed back to normal now. Though I have to give a slightly larger dose for meals than I had to prior to the vaccine shot. Hopefully in the coming days everything will return back to normal.