You are right, according to another article which seems more detailed than the one posted.
http://news.bbc.co.uk/2/low/health/6935482.stm - Diabetes problems 'vitamin link'
A simple vitamin deficiency may be the cause of many of the side effects of diabetes, a study suggests.
Researchers found people with the disease expelled thiamine - vitamin B1 - from their bodies at 15 times the normal rate in a study of 94 people.
The Warwick University team said thiamine helped ward off complications such as heart disease and eye problems, the Diabetologia journal said.
Not a cure, but can be a huge relief and improvement in quality of life.
That’s a great read. I hope folks on this board check it out. Thiamine is really inexpensive.