Protein Sparing Modified Fast Calculator

I put together the previous formulas into one single webpage, the Protein Sparing Modified Fast Calculator. I’ve put my own current numbers into the calculator. Just hit the “Calculate” button to see my numbers. Feel free to try it out with your own numbers and see if it helps you figure out any of this. I don’t see the numbers you enter nor are they stored in any database. All of the calculations are done on your phone web browser or Internet browser (Firefox and Chrome works but Internet Explorer doesn’t).

If you find any errors, please let me know. I tried it with my own numbers and they make sense but I didn’t have a woman’s secret numbers to check.

Here’s a decent introduction to the Protein Sparing Modified Fast (PSMF). I only take exception to one point which is the question of how long you can do a PSMF. They say you can’t do it for an extended period of time. If you continually re-calculate your numbers you should be able to fine tune for maintenance levels. This calculator makes that re-calculation relatively easy. Here’s the results I got for my numbers.

Your Scale and Metabolism Numbers

Current Weight: 199.8 lbs
Goal Weight: 171.3 lbs
Lbs from Goal Weight at start: 28.5 lbs
Body Fat at start: 25.4%, 50.8 lbs
Lean Body Mass (LBM): 149.0 lbs
Basal Metabolic Rate (BMR): 1818.0 cal/day
Initial Total Daily Energy Expenditure (TDEE): 2500 cal/day
Initial Maximum Fat Loss on Protein Sparing Modified Fast: 0.45 lbs of body fat per day


Protein Sparing Modified Fast (PSMF) Dietary Macros (per day)

It is very important on the PSMF that you eat at least the macros listed here. If you go below these numbers you risk lowering your metabolism and you actually can’t lose body fat any faster. Attempting to be just above the numbers is OK.

Protein: 119.2 g (476.8 cals)
Carbs: 20 g (80 cals)
Fat: 40.9 g (367.7 cals)
Your total Dietary Calories are 924.4 cals for maximum fat loss.

If you consume 216 g (1943 calories) of fat you will stay at your current weight.At your goal weight you will be able to consume 119.2 grams of Protein, 20 grams of Carbs, and 176.3 grams of Fat.


Can You Fast?

One important question to ask when considering extended fasting is whether or not you have sufficient body fat to fast.

You currently use 2500 cal/day. You have 1575 calories per day available from your body fat for maintenance. You have less calories available from body fat than your daily requirements and may not be able to fast. If you fast, your body may drop your base metabolism, energy expenditures or may consume protein stores. You will be -924 calories short per day

The thermic effect of food contributes somewhere from 5-20% of your current TDEE number so if you are fasting that can reduce your TDEE. Reducing your TDEE by 10% would result in you using 2250 calories per day. Calculating in a 10% Thermic Effect of food still leaves you in a caloric deficit during fasting. The Protein Sparing Modified fast solves this issue by providing the calories needed for the deficit.

How Much Muscle Can You Gain?

The Maximum Lean Body Mass that you can carry on your frame is 186.5 lbs at your goal of: 15.0% Body Fat. That would be a weight of 214.5 lbs.


Use this information at your own risk and with the advice of your medical professional. We are not doctors nor do we pretend to be one on the Internet. We do not take responsibility for errors in these calculations. We do not guarantee that these numbers will work for people at the extremes of the ranges. If you discover an error in calculation, please let us know through email: keto at land-boards dot com.

Tapped Out at 25 Days

I made it 25 days on my Water Only Fast. Ended yesterday. I miss fasting already. Felt better while fasting than I do on food. Ended with Chia Seeds and a pickle. The Chia Seeds act like a slowly moving cork through the system which is good after a long fast.

Thinking about doing Chia Seeds once a day on my next fast. Won’t technically be a water fast, but I like the idea of keeping some fiber moving through my system. I am just a few lbs over my goal weight so I am not in all that much of a hurry.

Weight loss was 24 lbs. Should hang onto a lot of it since I really kept up on salt.

Can’t wait to do my next Extended Fast. Maybe after the Keto meetup this weekend.

Tomorrow is my third intro class to CrossFit then I can join the regular people in torturing myself. I know that this will be much harder than Keto and Intermittent Fasting. And I will definitely keep up the Intermittent Fasting and Keto. Never going to give up the gains I have made with Keto + IF.

Preliminary Thoughts on Exercise

My Original Goal

At the start of this experience my goal was to Hack My Type Two Diabetes. Per my MD, I am no longer a diabetic and am just at the bottom end of the Pre-Diabetes range. So mission accomplished???

Are We There Yet?

My initial observation was that Diabetes is just a symptom of the underlying condition which is Insulin Resistance. Eating Low Carb. Moderate Protein and High Healthy Fats reduces the need for the body to produce Insulin but does it cure Insulin Resistance itself?

What is Insulin Resistance?

Insulin Resistance is the inability of the body’s cells to take in glucose in the presence of Insulin. From Skeletal Muscle Insulin Resistance Is the Primary Defect in Type 2 Diabetes.

Under euglycemic hyperinsulinemic conditions, ∼80% of glucose uptake occurs in skeletal muscle

If your muscles are not able to efficiently take up glucose then you have Insulin Resistance. It may be that exercise is the only way to improve glucose uptake in the muscles.

Types of Exercise

When it comes to improving Insulin Resistance, I think there may be a difference between the sorts of exercise, ie, aerobic and anaerobic exercise. Repeatedly dumping all of the glucose out of the cells is part of what is needed to increase insulin sensitivity. That seems like where High Intensity exercise comes into play. Things like rapid reps of high weights vs walking on a treadmill.

My Experience with Exercise

This would bear out with my own experience of the quick dump of glucose that I experienced in the high intensity workout. My glucose went up at least 80 points which I now think is due to Insulin Resistance. Not only is the liver dumping in that case but the muscles are dumping too. And that’s a good thing.

So perhaps if I got this right it’s more about the type of exercise when attempting to improve the underlying Insulin Resistance than it is about the exercise itself. Is it true to say the reason my blood sugar rises so high with high intensity exercise is that my muscle cells are still Insulin Resistant and that with more exercise they will get better at responding to the Insulin they are given and then I will not see high blood sugar spikes during and immediately after exercise?

If I have this right I should easy be able to measure and observe progress by checking my blood sugars after exercise to exhaustion and the levels should drop.

Here’s a pretty good article on the subject.

So why LCHF and Fasting?

Using LCHF + Fasting has helped me get to a weight where my pulse rate is lower, the stress on my joints is lower, my BP is lower and I am now at the point where I can safely exercise. Surely my Insulin Resistance is somewhat better but the only real way to attack it that is left is with high intensity exercise.

Navigating the Maze of Facebook Keto Groups

I really want to make some sort of map or list of questions that shows the groups and their “pet peeves”. The sorts of things include:

  1. Is taking Insulin good? Bernstein people say yes because their goal is lowest blood sugars. Keto people say no because they believe that more Insulin is more Insulin Resistance which is the root cause.
  2. Protein macros. Ketogains folks believe in 2-3 times the protein of most other keto groups. Other keto groups focus on the Insulin response of the body to protein. Too much protein although it doesn’t immediately raise the blood sugar does have a significant Insulin response so they keep it low. (Fung vs Finney/Volek).
  3. Exercise or not? Many keto groups say don’t exercise and point to the studies which show that diet plus exercise doesn’t lose any more weight than diet alone. Other groups are all about exercise and point to their physiques as evidence (and some are spectacular). They argue it is more about fitness than weight.
  4. Fasting. Most keto groups are starting to catch onto fasting. Some are not.
  5. What constitutes fasting? One group has a very, very specific list of things that you can consume while fasting and specifically excludes things like dry fasting.
  6. I think for the most part that the keto community agrees with the 20 grams or less of carbs a day but there may be differences with subtracting fiber when calculating. Certainly some have flexibility when it comes to additional vegetables.
  7. Artificial sweetners. Again various opinions on their positive and negative values.
    There are probably a lot more dimensions to this but those are the ones that come to mind.The best piece of advise I can give anyone is to read the pinned post when you join a Keto Facebook group. Most groups will ask you to do that and if you don’t agree with the pinned post don’t make it your personal mission to convert the group to your point of view. Just leave the group.

What my Doctor Said

I got off Insulin a year ago so I haven’t needed to go to my MD in two years. I decided for the one year anniversary of starting ketogenic eating to go to my doctor and get my blood tests. So I anxiously checked my email for the results of my blood tests.

The number I was most interested in was the HbA1C number. That’s the measurement of the average blood sugar level of the past three months. The test showed my HbA1C to be 5.8. That is at the bottom of the Pre-Diabetic range. 5.6 or less is considered to be non-diabetic. The value of 5.8 is an average Blood Glucose value of 120. That matches pretty well what my meter shows.

The doctor told me he has never seen this before or heard of this happening to anyone. I told him how I did it (documented in this BLOG). How I took off a week from work and decided I was going to figure out how to Hack my Type 2 Diabetes.

I recommended that the doctor look up Jason Fung and find some of his videos on Diabetes. Here’s one that YouTube has:

Blood Glucose Levels Over the last Three Months

Here are my blood glucose numbers over the past three months. I have been fasting the last week so the number are lower during the fast. This is an average of 113, and a HbA1c of 5.7. The normal range for level for hemoglobin A1c is less than 6%. Note that I am still taking Metformin. I am also doing High Carb, Healthy Fats plus Intermittent Fasting.

Another fast so soon?

I started a new fast on Sunday so I am at day 4 now. So far it is going very well. Not very hungry and not too grouchy (that I can tell). I’ve dropped off half the weight I regained over the four days of eating.

Stopped taking Metformin on the third day of this fast. My blood sugar numbers are up a bit but still on the low end. By dinner time last night my Blood Sugar was 88.

Considering starting up some exercise. Not for weight loss, it might in fact hinder some weight loss. More to work on my Blood Pressure. I have had a nice mountain bike since 2007 but I rarely ever ride the bike. So I bought a trainer which is attaches to the rear tire and turns the bike into a stationary bike.


One of my Keto/fasting heros, Tom, uses an ap called Kinomap. It lets you ride in different places in the world where people have recorded videos of their rides.

I pulled the bike out of the basement, cleaned it off and pumped up the tires. Hopefully I will be in riding shape by Spring. There’s a great bike trail very near to here,


150 miles of biking and hiking from Cumberland, MD to Pittsburgh, PA


Remission of pre-diabetes

Remission of pre-diabetes to normal glucose tolerance in obese adults with high protein versus high carbohydrate diet: randomized control trial

Results After 6 months on the HP diet, 100% of the subjects had remission of their pre-diabetes to normal glucose tolerance, whereas only 33.3% of subjects on the HC diet had remission of their pre-diabetes. The HP diet group exhibited significant improvement in (1) insulin sensitivity (p=0.001), (2) cardiovascular risk factors (p=0.04), (3) inflammatory cytokines (p=0.001), (4) oxidative stress (p=0.001), (5) increased percent lean body mass (p=0.001) compared with the HC diet at 6 months.

Thoughts on Fasting

I just finished something that most people would consider unthinkable. I just did a ten day fast and it was really easy. Here’s some thoughts on why it was so easy.

1 – Coffee.
2 – I am still 60+ lbs overweight.
3 – I am a meat eater so eating my own body (which is what fasting is) is easy for me.
4 – I have been on a ketogenic diet for 4 months now and am constantly in ketosis the whole time.
5 – I am a Type 2 diabetic who never got below 72 for blood sugar during the fast. Typical number was more like 85.


Low Carb and the “Authorities”

From the American Diabetics Association 2008 (Nutrition Recommendations and Interventions for Diabetes):



  • In overweight and obese insulin-resistant individuals, modest weight loss has been shown to improve insulin resistance. Thus, weight loss is recommended for all such individuals who have or are at risk for diabetes. (A)

  • For weight loss, either low-carbohydrate or low-fat calorie-restricted diets may be effective in the short term (up to 1 year). (A)

  • For patients on low-carbohydrate diets, monitor lipid profiles, renal function, and protein intake (in those with nephropathy), and adjust hypoglycemic therapy as needed. (E)

Wow. Back when I was a newly diagnosed T2D (in 2003) they were saying LC is bad. Now it is one of the recommended diets for Diabetics. Reading on…

The optimal macronutrient distribution of weight loss diets has not been established. Although low-fat diets have traditionally been promoted for weight loss, two randomized controlled trials found that subjects on low-carbohydrate diets lost more weight at 6 months than subjects on low-fat diets (19,20). Another study of overweight women randomized to one of four diets showed significantly more weight loss at 12 months with the Atkins low-carbohydrate diet than with higher-carbohydrate diets (20a). However, at 1 year, the difference in weight loss between the low-carbohydrate and low-fat diets was not significant and weight loss was modest with both diets. Changes in serum triglyceride and HDL cholesterol were more favorable with the low-carbohydrate diets. In one study, those subjects with type 2 diabetes demonstrated a greater decrease in A1C with a low-carbohydrate diet than with a low-fat diet (20). A recent meta-analysis showed that at 6 months, low-carbohydrate diets were associated with greater improvements in triglyceride and HDL cholesterol concentrations than low-fat diets; however, LDL cholesterol was significantly higher on the low-carbohydrate diets (21).

So everything (except LDL) was better with LC. And they did not differentiate between the various LDL (small particle size vs large).