**2.2 Specialty/complimentary ingredients**

The newest generation of topical moisturisers for psoriasis also routinely contains specialty or complimentary ingredients in addition to the fundamental moisturiser components detailed in Section 2.1. Common examples of such ingredients include: (1) ceramides that help to replenish the deficient lipids in psoriatic skin [71], (2) the versatile Panthenol (Pro-vitamin B5), which is a skin protectant with moisturising and anti-inflammatory properties [72, 73] and (3) the 'wonder molecule' nicotinamide (also known as niacinamide and Vitamin B3), which is one of the most widely used complimentary ingredients in topical moisturisers [74, 75].
