
Impulse Peptide Firming Serum
Day-weight firming concentrate
$90.00
30 ml / 1.0 fl oz · Priced in USD
- Free US standard shipping over $75.00 — 3–5 business days, tracked. Under that, $6.95.
- 30-day returns, opened or unopened. Full refund policy.
- A free 5 ml sample ships with every order — add it from Discovery.
One-time purchase — no subscription, no recurring charge. Your statement will show NEURO.
Key actives, at disclosed concentrations
Tripeptide-10 Citrulline3%
Targets the look of firmness and bounce.
Palmitoyl Pentapeptide-42%
A long-standing peptide for the appearance of lines.
Marine Exopolysaccharide1%
Gives an immediate smoothing effect.
Concentrations are printed on the carton as well as here. Where an ingredient carries no percentage it is present at a supporting level we do not consider worth claiming.
About this formula
Impulse is dosed for morning use. Tripeptide-10 citrulline at 3% and palmitoyl pentapeptide-4 at 2% address the appearance of firmness and fine lines; a marine exopolysaccharide gives a same-day tightening feel that makes the routine visible before the long-term results arrive.
Absorbs in under thirty seconds and leaves no cast under sunscreen. Fragrance-free. Net contents 30 ml (1.0 fl oz).
How to use
- 1Morning, after cleansing and any vitamin C, before moisturizer.
- 23–4 drops across face, jaw and neck, sweeping upward.
- 3Follow with moisturizer and SPF.
Full ingredient list
Aqua/Water, Glycerin, Propanediol, Tripeptide-10 Citrulline, Palmitoyl Pentapeptide-4, Pseudoalteromonas Ferment Extract, Sodium Hyaluronate, Niacinamide, Panthenol, Betaine, Allantoin, Hydroxyethylcellulose, Sodium Phytate, Citric Acid, Phenoxyethanol, Ethylhexylglycerin.
Ingredient lists are subject to change. Always read the declaration on the carton you receive. If you have a known allergy, patch test on the inner forearm for 48 hours before facial use. Discontinue use if irritation occurs.
Verified purchases
4.7 out of 5 · 942 reviews
“Fragrance-free actually means fragrance-free here. My skin reacts to everything and this was fine from day one.”
“Does what it says. I would like a larger size, which is the only thing keeping this off five stars.”
“Texture is the thing nobody talks about and this gets it right — no pilling under sunscreen, which killed my last three routines.”
Pairs well with

NS-01
Synapse Repair Serum
Nine-peptide overnight signal serum
30 ml / 1.0 fl oz
$89.95

NS-02
Axon Vitamin C 15%
Stabilised L-ascorbic brightening serum
30 ml / 1.0 fl oz
$70.00

NS-03
Relay Niacinamide 10%
Pore-refining tone serum
30 ml / 1.0 fl oz
$67.95

NS-04
Cortex Retinal 0.1%
Encapsulated retinaldehyde night serum
30 ml / 1.0 fl oz
$95.00