Albumin (Egg White)
A protein from egg white — generally halal, but still worth verifying against non-halal blending.
Why this is a critical point
On most food labels, albumin refers to egg-white protein, a source that is inherently halal as long as it is not blended with something questionable (an alcohol-based preservative or another animal-derived flavoring, for instance). In a pharmaceutical context "albumin" can also refer to human or animal blood serum — the context of use determines what further checking is needed.
Halal alternative
Usually no substitute is needed; just confirm the label explicitly states "egg albumin/albumen".