Glucosamine and lower blood sugars in a type 1 diabetic

i started taking glucosamine for a shoulder that is achy. thats all good, but I have noticed my sugars have started to come back a little lower after taking my insulin and eating.
just wondering if anyone else has seen this, and if its normal?

background-
fast acting insulin (NovoRapid) avg 16 units
24hr insulin (Toujeo- Solostar) 50 units

thanks