Since such a bar contains a small amount of flax seeds, there is no reason to worry. The effect of the pills will be preserved even if you eat it just before or immediately after taking the contraceptive pill.

Protection could be reduced if you consumed, for example, 2-3 teaspoons of flaxseed or an infusion of ground flax seeds – then a coating layer forms in the digestive tract, which can hinder the absorption of drugs – a 2-3 hour interval between these products and drugs is recommended.

In your case, there was no such threat, thanks to which protection is provided at all times.

I'm attaching a link to a helpful post:

https://www.gdziepolek.pl/artykuly/czy-jedzenie-i-picie-obnizaja-skutecznosc-antykoncepcji