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Editor's Tip Editor's Tip

Double up and pair this serum with Retrospect’s Night Renewal moisturizer.

Retrospect C4-7 Intensive Serum

$90.00 Ships Free
0.5 fl oz

Availability: In stock


Birchbox Breakdown

We don’t have the time or the patience to read volumes of scientific research in search of an antiaging ingredient that doesn’t make false promises. Good thing the skincare experts at Retrospect did the hard work for us. Their concentrated serum contains a unique form of keratin protein that softens the look of wrinkles by triggering collagen production within your cells right at the point in the skin where wrinkles form. Backed by years’ worth of clinical trials, it also heals surface redness and has potent anti-inflammatory properties.

How to Use

Morning and night, apply a thin layer of the serum to your clean face and neck, focusing on the areas where the signs of aging are the most prominent.

Water, Oxidised Keratin, Keratin, Hydrolyzed Keratin, Ethylhexyl Olivate, Tocopherol, Butyrospermum Parkii (Shea) Butter, Calendula Officinalis Extract, Retinyl Palmitate, Cyclopentasiloxane, Dimethicone Crosspolymer, Carbomer, Phenoxyethanol, Tetrasodium EDTA, Ethylhexylglycerin, Sodium Hydroxide, Lactic Acid.

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Product Reviews & Sample Feedback

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Most Helpful Customer Reviews

Difficult to see effectiveness without long-term use

I received this product in my January box, and while it may work well, I think I A., don't have skin that's aged enough to need intensive therapy, and B., think this is the type of product that shows results over time. Maybe in ten years I'll try again, but I did like the weightless texture.

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liked the product but didn't like the breakout

The product was great upon first use. It goes on nicely and made my skin feel very smooth and even. Would have liked to try for longer but my skin broke out after night two so I had to discontinue use.

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I really loved this when I put it on last night as a moisturizer, but when I woke up this morning I had a HUGE pimple was starting to form on my face. I can't even remember the last time I had one. Not impressed.

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Makes skin really smooth

The product is a little on the high end of the price scale, but it really makes your skin amazingly smooth. I really enjoy the softness and a little goes a long way.

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Pretty good serum!

I liked this serum, it made my skin smooth and feel like it was effective, will see over time!

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