Possible Clues:

• Albumen
• For example, weight training protects that yoke by the sound of it?
• Meringue ingredient
• It's perfect for meringue, for example, and for shifting weight
• For example, going back and forth grappling with cooking ingredient
• For example, it's great for one of the knights you'd associate with that yolk
• Cake ingredient, say, good with cream
• Meringue requirement
• Basis of meringues, for example, each way without a particle
• Albumen, not the yolk