Trinny London - Peptide HA Serum - Plump Up - 30ml - New Sealed. Sell-out lightweight serum that visibly firms and lifts for plump, hydrated skin – we call this our bestselling miracle worker for a reason.Advanced peptides help promote your skin's collagen and elastin production to plump and reduce the appearance of fine linesHyaluronic acid deeply hydrates and restores bounceThe skincare equivalent of restoring pillowy fullness to a well-worn cushion