My best friend wasn’t happy in his search for a good health jam for diabetics. So, I emailed my daughter who is Juvenile Diabetic a jam using Chia Seeds.
Doing a bit of research I found an article Harvard T. H. Chan School of Public Health. Here is some of what they write about Chia Seed:
Two tablespoons of chia seeds (1 ounce or 28 grams) contain about 140 calories, 4 grams of protein, 11 grams of fiber, 7 grams of unsaturated fat, 18% RDA for calcium, and trace minerals including zinc and copper. They are the richest plant source of omega-3 fatty acids. Chia seeds are a complete protein, containing all nine essential amino acids that cannot be made by the body. 
There is so much more information on their site and also throughout the internet.
The recipe my daughter sent for jam requires Chia Seeds. Certo is not needed for the Chia Seed provides for a thickener.
My friend has found that this recipe does not affect his blood glucose numbers. Also, I have tried it and I like it better than store bought.
Here is the Recipe:
Take 2 cups of frozen berries (either raspberries or strawberries or blueberries).
Put this in a pot and let it simmer over low heat until the berries are good and soft.
Add in approx. 1/2-3/4 cup of sweetener. (Splenda or equivalent)
Once this is stirred in and dissolved, add in aprx 2-3 TBSP of chia seeds.
Place in jars adding seals and rings
Process approx. 45 minutes
Set aside to cool
So dear reader if you are diabetic or know someone who is pass the recipe onto them. Give it a try!