I use skin,hair and nails formula from Holland & Barret.?

but someone told me to confirm about the Gelatine in its ingredients if its from vegetables,beef or pork. so being a Muslim,i'm really concerned about it because pork is not Halal in our religion, and since i was not sure about it,i stopped using it right there. how can i find out about it?can anyone help me in this matter pls? i shall b grateful.thanks!