Useful Foods and Supplements

Alcohol - This is metabolized into Acetyl Coenzyme A directly. It is not metabolized into glucose. The metabolism of alcohol takes preference over glucose production from protein in the liver so whilst your liver is dealing with the booze it delays glucose production. So have a glass of wine with a large glycaemic load meal if you want to help control the glucose spike.
Cinnamon - a level teaspoon per day with meals or more simply in a capsule form - see http://www.diabetes.co.uk/natural-therapies/cinnamon.html or http://www.naturalnews.com/035642_cinnamon_blood_sugar_regulating.html or http://www.lef.org/magazine/mag2005/dec2005_report_cinnamon_01.htm
Ginger (This significantly delays glucose absorption from the gut, blunting any glucose spikes enormously - but it does not metabolize any glucose - the area under the glucose level curve is not altered, the spike is just flatter - see my experience at the Bombay Palace. Use Ginger with large meals, 1 cc of raw ginger root for every 500 kcal, in weeks 1-4 only, when your glucose response will be slow)
Omega 3 (EPA and DHA) supplements
Garlic - There is scientific evidence for general health benefits which include blood sugar regulation and insulin resistance reduction
Multivitamins especially Vitamin C since fruit is excluded (ONE per day every day).
Cod Liver Oil capsules
Salmon Fish Oil capsules
Bake yourself some low carbohydrate, high fibre bread. It will solve the constipation or apparent constipation problems associated with low calorie diets.
Vitamin D deficiency is common in the UK and associated with insulin resistance. The writer had vitamin D deficiency. So get tested and fix that if found. But there is no need to take any Vitamin D supplement if you are taking a lot of Omega3 foods since they generally have Vitamin D in them in large quantities.
Alpha Lipoic Acid (not to be confused with Alpha Linoleic Acid which is an Omega 3 fatty acid) http://www.webmd.com/vitamins-and-supplements/lifestyle-guide-11/supplement-guide-alpha-lipoic-acid

According to Web MD http://diabetes.webmd.com/guide/natural-remedies-type-2-diabetes?page=2 ...

The following plant foods are sometimes used for diabetes treatment, particularly for those with type 2 diabetes.

Broccoli and other related greens
Cloves
Okra
Fenugreek seeds
Sage

Most commercial cinnamon preparations are actually from Cassia (''Cinnamomum aromaticum'', Chinese, Saigon, Burma or Java Cinnamon), which also contains anticoagulants - which can cause bleeding. Whereas Ceylon Cinnamon ''Cinnamomum zeylanicum'' or true cinnamon ''Cinnamomum verum'' does not and is therefore preferable for sustained use.

Bogus Diabetes Remedies: Chromium Polynicotinate (a better idea than Picolinate) and Brewer's yeast is said to help provide Glucose Tolerance Factor (GTF). However a double blind study in Diabetes Care 30:1092-1096, 2007 showed that "Chromium treatment has no effect in patients with Type 2 in a Western Population." And there is scientific debate as to whether GTF exists.