I Started the Personalized Diet – Here’s What Happened

Hi, my name is Louise, and eight years ago I was diagnosed with breast cancer.



I managed to beat the cancer after getting radiation and a mastectomy.

Five years ago I was diagnosed with cancer again.

My type of breast cancer is one related to too much estrogen, and according to my oncologist, having more fat tissue (as I have), will raise my estrogen levels.

Diets, and Many of Them….

I have tried them all and each time, after a long battle with willpower, I regain the weight.

A couple of weeks ago I saw a video where an Israeli researcher spoke about why one diet cannot work for everybody. This peaked my interest and I ordered his book, The Personalized Diet.

Unlike most other diet books, this book is based on hard science – double blind studies and research published in scientific journals. In the book they present evidence on why a diet that works for one person will fail for another.

One-Size-Fits-All for Dieting

Because of the our internal gut bacteria, our individual systems will react adversely to one food where it is quite okay with another.

For example, if after a meal of oats your blood sugar levels spike by more than 10-20%, it shows your body is having an adverse reaction to the food.

Why is Your Blood Sugar Spiking a Bad Thing?

The moment you blood sugar spikes your brain detects this and releases a flood of insulin from your pancreas to normalize the glucose levels in your blood.

The insulin goes to every cell and unlocks them to absorb blood sugar. If the cells have had their fill of energy, the insulin turns the glucose to fat for later use in times of need. This is of course a bad thing and this is when you gain weight.

The more your blood sugar spikes, the more the pancreas needs to work to counteract this, and after many years your pancreas becomes tired and does not release as much insulin. Or your cells might get tired of the insulin flood and you become insulin resistant. These are all early stages of becoming a diabetic.

What Dr Segal recommend in the book is to measure the body’s glucose level after each meal. If the spike is 10 – 20% or more than the baseline measurement, then the fat is going to pile on.

How I Prepared:

  • I purchased a blood glucose meter. Note: the meter you purchase can either be in mg/dl or mmol/dL. It doesn’t matter – as long as you do a test before the meal and compute the % increase afterwards.
  • Loads of test strips.
  • I initially measured my blood 3 times consecutively to ensure the meter readings do not deviate more than 10% from one another for accuracy.
  • Also measured my blood sugar level the next morning before breakfast to get a resting count.
  • I recorded my weight. 86.2kg / 190lbs.
  • Posed for a “before” photo.
Why No One Diet Works - Before Photos
My Before Photos

How to take the measurements:

Measure your blood sugar when you are about to take the first bite of the meal (the baseline reading), then again at 30, 60, 90, and 120 minutes. Record it in a spreadsheet/little black book.

Here are Some Interesting Results From My Measurements:

No One Diet Works for Everyone Heres Why Spaghetti
Image by Divily from Pixabay

Pasta Meal

I started Day 1 on a supper of Pasta topped with a tomato mix.

My readings (in mmol/L):

Me: 5.3(baseline), 7.9, 7.2, 6.3, 5.9

Husband:  5.3, 8.5, 6.9, 5.7, 6.2

Daughter: 5.4, 6.8, 7.2, 6.4, 5.4


This dish caused my blood sugar to spike by 49%. Something here is not good for me. Is it the wheat in the pasta? The American diabetes association lists oats as a low GI food.


No One Diet Works for Everyone Heres Why Brown Rice
Image by mquadrelli0 from Pixabay

Brown Rice

Everyone believes brown rice is the ultimate in health. Let’s see what it did to my sugar.

My readings (in mmol/L):

Me: 4.8(baseline), 7.2, 6.1, 5.6

Husband: 4.7(baseline), 5.3, 5.6, 5.7


A spike of 50% on the healthiest staple on earth. Husband small to medium reaction. Both of us O positive blood group.

No One Diet Works for Everyone Heres Why Oats
Image by haaijk from Pixabay


A breakfast of oats with a pinch of salt added.

My readings (in mmol/L):

Me: 5.6(baseline), 7.1, 6.7, 5.9, 6.5


Here I had a spike of 37.5%. This is really bad news as I have always thought that oats was the super breakfast. Is there anything that is not going to make spike? Some panic here.

The American diabetes association lists oats as a low GI food. If it has this effect on me are there not more people getting the wrong advice?


No One Diet Works for Everyone Heres Why Roast Chicken
Image by Wow Phochiangrak from Pixabay

Roast Chicken

Although following a vegan diet for the last couple of months, I was getting curious as to our reactions to meats. Also feeling some panic as most of the grain based foods cause me to spike.

My readings (in mmol/L):

Me: 5.3(baseline), 5.6, 5.2, 5.0

Husband: 4.5(baseline), 4.6, 4.9, 5.0

Daughter: 4.4(baseline), 4.6, 4.6, 4.9


It seems there is some truth to the O positive blood group’s affinity to meats.

I need to find foods that will be beneficial to my blood sugar. Also, I can never come close to bread and brown rice again.



The takeaway from the personalized diet is that every person reacts in a unique way to specific foods. These were my reactions – if you measure your reactions to the same foods, you will probably not get similar results.

Please consider turning yourself into a lab rat and seeing what foods you react to. It could have a far reaching effect on the rest of your life.

And leave your comments at the bottom if this has helped you in any way.


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