Recently receive bottles Opti3 Liquid.
After opening and storing in the fridge for about 3 weeks,
it starts to become whitish and thicker.
Is this normal, or has it gone bad?
I have read normally it should remain good for 12 weeks in the fridge.
Hi, it sounds like some of the fatty acids have solidified due to the very cold temperature. This is perfectly fine and will simply prolong the shelf-life. If you leave the bottle out at ambient temperature for a few hours, any solidified fractions will melt again.