[arijo]

I actually do that frequently to comply with my ketogenic diet - take a photo of the macro nutrients quantities, calories from the nutrition facts table on the food package and use ChatGPT or some other LLM to calculate the estimated calories per portion.

You can then validate the data by tracking your lost calories (calculable from your lost weight - I do it each week) and compare with the predicted weight lost calculated from the vendor 's nutrition facts table.