2. Black Plum
This is also known as Indian Black berry or ‘Jambul’ in local terms.
It contains anthocyanins, ellagic acid, hydrolysable tannins which help in the lowering of the blood sugar level. (https://www.ncbi.nlm.nih.gov/pubmed/23030429)
3. Bitter Gourd
Teams from the Garvan Institute of Medical Research and the Shanghai Institute of Materia Medica pulped roughly a tonne of fresh bitter melon and extracted four very promising bioactive components.
These four compounds all appear to activate the enzyme AMPK, a protein well known for regulating fuel metabolism and enabling glucose uptake. Thus, bitter gourd is beneficial for both type 1 and type 2 diabetes. However, it cannot be used to entirely replace insulin treatment.
Drink some bitter gourd juice on an empty stomach each morning. First remove the seeds of two to three bitter gourds and use a juicer to extract the juice. Add some water and then drink it. Follow this treatment daily in the morning for at least two months.
Also you can include one dish made of bitter gourd daily in your diet.
See also: Reversing diabetes Type-2
4. Fenugreek
This is an herb that is effective in combating diabetes and treating glucose problems in the body.
It can be consumed by soaking the seeds in normal water overnight and then consuming the water as well as the seeds. (https://www.ncbi.nlm.nih.gov/pubmed/19839001)