Low-carb Kraft test

Last update: 11 July 2020

Originally posted here on Wykop.

I went to have a 2h oral glucose tolerance test with an insulin assay (Kraft test) while on a low-carbohydrate (carnivorous) diet, without carb-loading beforehand, and these are the results.

Noteworthy points:

  • I did not show carbohydrate intolerance, despite eating next to no carbohydrate for an extended period of time. The level of ketosis I’m usually in is very low (0-0.2 mM), given how much protein I eat, and I believe this is the reason – added carbohydrates do not upset the metabolic state, which burns a mixture of carbohydrate and fat.
  • My results are consistent with the healthy Kraft pattern I, reproduced below from dr Joseph Kraft’s book on diabetes (used under the auspices of fair use for educational purposes).
  • In fact, it’s highly surprising that I am able to return to a “fasted” state within 2 hours of consuming 75g of glucose. This suggests that my fat cells are mostly empty, despite there being a considerable total mass of them (15-20 kg). My later fasting leptin corroborates this.
  • Additionally, I did not expect the low glycemic response on the second try. I suspect my protein consumption in the preceding days.