Why product tests at all?
Since 2014 I have been dealing with my metabolic disease – and with the question of how I can reach remission without medication and stay there. Exercise, discipline and diet are my tools. Products such as protein powders, low-carb alternatives, ready meals or food supplements constantly cross your path along the way. The advertising promises are loud; the actual effect on your own blood sugar is often a very different story.
That is exactly where I come in: I don’t test products by taste alone, but with my CGM sensor (FreeStyle Libre 3) on my own body – under everyday conditions, including training on the Peloton and the unplannable night call-outs with the volunteer fire brigade.
What my tests can do – and what they cannot
Honesty first: my measurements are single-case observations (n=1). They show how my body reacts to a product. They are not a study and cannot be transferred one-to-one to other people. Glucose responses to identical meals differ considerably from person to person – this is well documented scientifically .
Therefore the following applies to every test article on this site:
- Documented information is only what is proven by guidelines or high-quality studies – for example that the carbohydrate quantity of a meal is the most important driver of the post-meal glucose rise.
- Possible explanation are mechanisms that are well founded but not directly investigated for the specific product.
- Unclear is everything for which robust research is lacking – this concerns many food supplements in particular.
- My own curves are always labelled as a single-case observation.
My test protocol
So that the results are comparable with one another, I test according to a fixed scheme:
- 1. Baseline: Test in a fasted or standardised state (same time of day, at least 3 hours after the last meal, no training immediately beforehand).
- 2. Documentation in Libre: I note the product, amount and time directly in the Libre app, anchored to the glucose timestamp.
- 3. Observation window: At least 3 hours after consumption, looking at peak height, time to peak and return to baseline.
- 4. Repetition: Conspicuous results I repeat on another day – a single reading can be misleading (stress, sleep, previous day’s training).
- 5. Separate the context: Days with night call-outs I evaluate separately – stress-intensive call-outs raise my glucose level even without eating, moderate endurance training lowers it. Otherwise this would distort every product result.
The providers of this test series
The series opens with seven providers from three categories:
| Category | Provider |
| Supplements & protein | More Nutrition, ahead, Nature Love, NATURTREU |
| Low-carb foods | Steiner’s (Steinerfood) |
| Ready meals / meal prep | FITTASTE, prepmymeal |
For each provider there is first a basics article: who is behind it, what is in the range, what is relevant for blood sugar and metabolism – and what exactly I will test. The actual CGM test reports follow once the measurement series are complete.
Important classification
No product discussed here can cure a metabolic disease or induce remission. Remission arises – if at all – through the overall package of weight reduction, diet, exercise and medical guidance; the best research for this is provided by structured programmes such as the DiRECT trial . Products can at most make this path easier – or make it harder through hidden carbohydrates and false promises. That is exactly what this series aims to make visible.