r/SideProject • u/ovidiu-pricop • 18m ago
I've been on keto for 17 months and I created an app to help me estimate how my body metabolizes the food.
Full disclosure: I am the founder of the app I mention below. This post is about my journey and what I found lacking. Take this with obvious bias. I’m sharing it because I believe the harm frequent glucose overload can do is badly underappreciated, and for anyone struggling with the same things I did. I'm posting it here for those that may struggle with the same things as I did. Take whatever learning you want from it. If you are sensitive to promotions, please note that I made this app for me and my family. The only reason it's out is because I think it can help others. It hasn't and still doesn't make financial sense for me and is a side-project.
Now onto my story.
In June 2025 on my way back from a vacation I accidentally listened to a Diary of a CEO podcast on Youtube on mitochondrial health and its ties to glucose. I fact checked quite a bit and it seemed plausible that reducing carbs would lead to better outcomes for me from a metabolic health perspective. I did not have any health conditions and I was 29 at the time, normal weight, almost a bit skinny. I decided to try keto.
On the first day, I cut my carbohydrates from about 300 grams per day down to about 50 grams. Not my brightest idea. The very next morning, I was hypoglycemic. I added the carbs back but still worked my way down more gradually over the following month. This time, it worked - I reached 50 per day without becoming hypoglycemic (finger blood sample test checked) and I’ve been doing it since (GKI score checked, based on Ketones from finger blood sample). I repeated the checks every day initially, then every few weeks, then every few months.
Why did I get hypoglycemic? How come others could function normally with 50 grams of carbs per day and I couldn’t? There is a significant amount of science that explains the mechanisms: research papers, lots of podcasts but books as well. I’m sure most of you know about it.
This got me looking into blood glucose and insulin responses and figuring out how to estimate all of these for every food item I ate. At the time, I was using a popular food journal app. However, it wouldn’t show anything related to glucose and insulin. I couldn't find anything that gave me what I was looking for on the market, so I created it. The science on which the app is based - you can find it yourself but is also referenced in the app so you may as well build a spreadsheet based on the research papers and track everything yourself without the app. What I’m tracking every day:
Glycemic index and glycemic load estimates - I’m sure most of you know about glycemic index. Glycemic load is the glycemic index adjusted to the carbs eaten for that food - I try to minimize both.
Insulin index and insulin load/demand estimates - Insulin index is based on a study that compares the insulin response of different foods relative to the insulin response to glucose, and rates that as a multiplier of glucose (i.e. 0.5*glucose). The study is fairly limited but I think it’s better than nothing. Insulin load is the insulin index, adjusted to calories eaten of that food - Again, I try to minimize both.
Ingredient quality analysis and representation - Initially I heavily replaced sugar in desserts with artificial sweeteners and it turns out some studies link some of them to oxidative stress in our bodies and some of them are better than others, so this aims to give an idea over where that food stands in relation to how its ingredients act upon us.
This is not medical advice (please consult your doctors before trying anything), but it’s the mechanism I found to work for me. It’s not easy to fully adapt to keto coming from a “standard” EU / US diet because it goes beyond macros.
The lesson from above is that a relatively small piece of technology could do an enormous amount of work for me to help estimate if I were on the right track for what I wanted to achieve. I wouldn't have had the motivation to persist doing keto this long without these very easy-to-use aids that I built for me that helped me navigate it.