CAM for type 2 diabetes
Researchers from the University of Ottawa, in Ontario focused their review on type 2 (AKA adult onset) diabetes.
Here’s a summary of the evidence for CAM therapies.
Cinnamon
- 2 of 3 studies report a decrease in fasting blood sugar.
- Overall, there’s moderate evidence that cinnamon lowers blood sugar levels.
- Its effect on A1c (a measure of long term diabetes control) appears negligible, but long-term studies are needed to properly evaluate this effect.
Chromium
- A1c and fasting blood sugar were significantly reduced in a meta-analysis of all data.
- There’s strong evidence that 200 to 1000 mcg of chromium picolinate daily improves diabetes control.
- Based on its safety and potential cost-effectiveness, a definitive study is needed.
- Biotin might enhance its effects, but this combination requires further study.
Vanadium
- Fasting blood sugar was reduced in some less well-designed studies.
- There is insufficient evidence to support its use in diabetes.
Fiber
- A non-significant reduction in A1c was reported in 1 of 3 studies.
- Fasting blood sugar was lowered in 6 of 12 studies.
- Evidence of short-term benefit is conflicting.
- Fiber can be recommended based on its benefit for other cardiovascular risk factors, however.
Green tea
- Fasting blood sugar was lowered in 1 of 3 studies.
- There’s little evidence that green tea improves diabetes control.
- Based on epidemiological evidence, further research is warranted.
- Green tea can be recommended based on its potential for other health benefits.
Bitter melon
- No benefit on A1c or fasting blood sugar in 2 small studies.
- Current evidence doesn’t support its use.
- Further studies in cultures where it has been used traditionally might be useful.
Fenugreek
- Fasting blood sugar was lowered in 1 of 3 studies.
- Limited supporting evidence for diabetes, and high doses might be impractical for most patients.
- Lipid-lowering benefits should be studied.
Gymnema
- A1c levels were reduced in 2 small studies.
- This A1c response warrants further study.
The bottom line?
Today, A1c is the best test of a treatment’s value for controlling diabetes. Future studies must account for the fact that it takes 3 months to see a change in A1c in response to any treatment.
Another recent reivew of herbals to treat diabetes is here.
6/14/09 16:55 JR