Hey @eva-schobert
I've been down this road and totally get the struggle with calculating everything yourself.
I've tried all kinds of fasting over the years. Water fasts, 16:8, OMAD. Never tried sham fasting, though. My problem was always day 3 of a water fast when I'd start obsessing about food, get headaches, and my energy would just tank. Didn't work with my job and family life.
Recently, I gave ProLon's 5 Day Next Gen Box a go. It's a fasting mimicking diet, so you're eating around 1,100 kcal on day 1 and 700 to 800 on days 2 to 5. Plant-based soups, bars, snacks, teas. Low protein, low sugar, higher healthy fats.
What surprised me most was that I actually kept my muscle. Lost 2.1 kg total, about 400g of visceral fat, but less than half a kilo of lean mass. Ketones got up to 1.4 mmol/L by day 4 and my energy stayed way more stable than on water fasts. Focus even got better toward the end.
Taste was honestly fine. Not amazing, but the soups were decent and the convenience of just opening a box and eating without thinking made it easy to stick with.
The catch is price. It's €249 for the organic version or €189 for non-organic. Not nothing, but for me it was worth skipping the DIY headache.
Happy to share more if you have questions!