I’ve mentioned before around here that I’ve had to go on a PSMF fast for surgery (tomorrow). Today, on the last day of the preparation, I thought I’d post results. If anything unexpected happens I’ll add more tomorrow (if I have time) or later.
To begin with, although it’s obviously a PSMF, that’s not how the surgeon frames it. They call it a liquid diet, but it’s low calorie, low fat, protein shakes and zero calorie fluids only for seven days. Since I had to buy 8 days worth, at $11 and change per day, being a cheapskate, I’m doing 8 days. I bought Fairlife Core Power shakes because of the 42g of protein per bottle at 230 calories. Three a day is 690. I added a teaspoon of HWC to my coffee, getting me to 720 calories per day. Unfortunately, I didn’t shop carefully enough because they have 8grams of carb per bottle or 24g/day. On most days of regular life, though, I’m around 30g so it’s not really a big deal.
The results surprised me a bit. I lost a bit over 1 pound per day. According to my Renpho digital scale:
Date | Weight lb.s | BMI | Body Fat % | Lean Body Mass lb.s |
---|---|---|---|---|
01/18/23 | 212.8 | 28.8 | 28.0 | 153.2 |
01/19/23 | 210.8 | 28.5 | 27.5 | 152.8 |
01/20/23 | 209.8 | 28.4 | 27.3 | 152.4 |
01/21/23 | 208.0 | 28.2 | 27.0 | 151.8 |
01/22/23 | 207.0 | 28.0 | 26.8 | 151.6 |
01/23/23 | 206.0 | 27.9 | 26.6 | 151.2 |
01/24/23 | 205.2 | 27.8 | 26.4 | 151.0 |
01/25/23 | 204.2 | 27.7 | 26.2 | 150.8 |
(Left off all the other columns)
My weight at the end of an overnight fast the previous Friday (1/13) was 209. Why the big jump from Friday to Wednesday? I’m afraid that’s just going to remain a puzzle. I’ve gone to only weighing in once a week after about 36 hours of fasting because it’s more repeatable; I don’t know how that fits into this measurement. All I can say is they have in common being first thing in the morning, wearing the same minimal clothing.
As you might imagine, if I plot that piece of the spreadsheet, it’s almost a straight line.
While I like the progress, the experience was a bit of let down. As a way of living, it’s incredibly boring, and I’d consider it unsustainable long term. If it was repeatable, and I could stay on it another 15 or 20 days to reach a goal weight, I might be able to do it, but like anything with vastly restricted food choices there are just too many uncomfortable questions.
The first is how much comes back when we start eating again? If my scale says 205, like the last line, what is it “really?” Just having more in our digestive tract will add weight.
I think anyone who has been on a calorie-restricted diet, or even read about them (which is pretty much everyone here), knows that our bodies adapt and slow our metabolisms to reduce our CO in line with CI. (I like to pronounce CICO as “psycho”). It’s not just we need fewer because of the reduced weight, basal metabolism goes down.
That said, maybe it would be more interesting to experiment with PSMFs that use real food. If that varies from pure carnivore, which I almost am.