The key figures
| Brand | NATURTREU |
| Product | Kraftreserve – Magnesium complex from citrate, oxide, malate & bisglycinate |
| Form | 180 Kapseln (3 Monate) |
| Price | approx. 21,99 € (as of July 2026) |
| Key ingredients | Magnesiumcitrat, -oxid, -malat, -bisglycinat |
| Blood-sugar relevance | medium |
The technical look at the ingredients
Magnesium and insulin sensitivity
The connection is well documented: people with type 2 diabetes more often have a low magnesium status, and observational studies show a link between higher magnesium intake and lower diabetes risk .
Supplementation is more differentiated: meta-analyses find improvements in insulin sensitivity and fasting glucose mainly in people with a proven magnesium deficiency or insulin resistance . In well-supplied people, an additional effect is not documented .
On the compound form
The complex combines citrate, oxide, malate and bisglycinate. This makes sense: oxide has a high elemental content but poorer bioavailability, citrate and bisglycinate are better available and gentler on the stomach. Bisglycinate is considered particularly well tolerated.
Practical note: magnesium is one of the few micronutrients where a deficiency realistically occurs in Germany – especially with a lot of sport and sweating. That makes this preparation more relevant to me than most others.
Safety and tolerability
Doses that are too high have a laxative effect. With impaired kidney function, magnesium may only be supplemented after medical consultation.
Test considerations
No direct CGM test is sensible – magnesium effects are not visible in the glucose curve in the short term. Instead: laboratory value before/after and subjective recovery after training.
All of my own measurements are labelled as a single-case observation (n=1) and cannot be transferred to other people.
Sources
- Product information NATURTREU Kraftreserve: composition and dosage per manufacturer (as of July 2026).
- EU Register of authorised health claims, Regulation (EC) No 1924/2006.
- Specialist literature and meta-analyses on the ingredients mentioned; classification by assessment in the text.
- Lean MEJ et al.: DiRECT trial on remission in type 2 diabetes through weight management, The Lancet.