Trimspa and Diabetes?

So I bought a bottle of trimspa X32 and I just got online to look up any side effects, ect.
I found a couple of things that said not to take it if you have diabetes. (I have diabetes type 1)
The only reason I could find for this is that it will increase your bloodsugar levels because you hold onto sugar longer.
Is there anything else that happens with a diabetic taking Trimspa?
If so, is there any way to surpass it?
Please don’t give me crap about how vain I am.
I have reduced my calorie intake to 500 calories a day, work out for 30 mins a day and have lost a pound in the past month.
I’m looking for some help.
I only want an answer if you know what your talking about.

will my grapefruit diet work?

for the next 5 days… this is my menu:
Breakfast: 50cal unleavened bread, 1 grapefruit
Lunch: 50cal unleavened bread, 1 grapefruit
Snack: 50cal unleavened bread, <100 cal worth of fruit (ex: 2 kiwi)
Dinner: 50cal unleavened bread, 1 grapefruit
Total Calorie Intake: is about 650
I will exercise about 30 min/day (approximately 200-250 cal)

would it work? the fruits are on the negative calorie list. the carbs are just to fuel my brain :D