Why SPF is the most important step in any routine
Every serum you buy works better when your skin is protected from daily UV. Without sunscreen, vitamin C, retinal and peptides are fighting a losing battle.
How much is enough?
About two finger-lengths for face and neck — roughly 1.25 ml. Most people apply a third of that, which can cut the real protection by more than half.

Reapply every two hours outdoors
Indoors by a window? Once in the morning is usually enough. Outdoors, sweating or swimming? Reapply every two hours and after towelling off.
Broad spectrum matters
SPF measures UVB (burning) protection. Look for PA++++ or “broad spectrum” for UVA, which drives pigmentation and collagen loss. Invisible Veil is SPF 50, PA++++.
