- Protein snack bar, perfect for on-the-go snacks or a post workout treat - Nature Valley protein cereal bar - High in protein, high in fibre, gluten free. Containing 20% of your daily protein needs. - Great tasting bars with no artificial flavours, colours or preservatives - Suitable for vegetarians. Carefully selected ingredients. Protein contributes to the maintenance of muscle mass and of normal bones. Nature Valley? Protein is high in protein.