Review: Algenist – Double AA Barrier Serum

Where to purchase: Available at LookFantastic (UK): HERE / LookFantastic (US): HERE / Feel Unique: HERE / Sephora: HERE

Price: £80

Volume: 30ml

Made in: Germany

What is it + What does it do: A serum containing antioxidants and skin-barrier fortifying ingredients to help protect and improve the condition of the skin.

The company claim: it helps defend the skin against environmental aggressors + protecting the skin from pollutants (due to the inclusion of Antioxidants). Through the use of Niacinamide + other antioxidants, this is also supposed to help minimise the look of wrinkles.

Supposedly Good for: All Skin Types

What I think: I agree all skin types (even sensitive skins) could use this. I do think Oily/Combo Skins > Dry Skins, but if you’re applying this under a moisturiser, then Dry skins would enjoy (as this contains emollients).


Vegan?: Yes

Cruelty Free?: Sells in China, so not fully yet.

How long does it last after opening?: 12 Months

Packaging: Plastic Bottle with a cap and then a pump – lightweight as well. Easy to travel with (and I had no spills).

Patreon Takes a Stand Against Hate - Leaf&Core
Click on the Logo!

Support the Blog / Instagram / Youtube on Patreon! Includes Perks and Benefits such as EXCLUSIVE Content! LINK HERE

Directions: Apply after cleansing and toning to the face, neck and décolleté. Follow with a moisturiser.

How I use it: As this is slightly heavier than more watery serums, I used this as a moisturiser. The silicone base + emollients in here meant that this still retained the moisture on my skin. I used about 3 pumps for the face and neck.

Key Ingredients: Niacinamide (Anti-Blemish, Moisturising, Skin-barrier reinforcing and brightening). Ascorbic Acid (Vitamin C – Antioxidant + Brightening, but probably quite a low amount). Phloretin, Ergothioneine, Epigallocatechin Gallate, Tocopheryl Acetate (All Antioxidants as well). Retinyl Palmitate (Increases Skin shedding to reveal smoother and brighter skin, good for sensitive skins). Aspartic Acid, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine (Amino acids which work to reinforce the skin’s barrier + draw moisture into the skin), Arginine (also helps reinforce the skin’s barrier). Epigallocatechin Gallate (Soothing).

This also contains Alguronic Acid (sourced from Algae) which forms a film on the skin and also helps protect it from environmental pollutants.

Full Ingredients: Water (Aqua, Eau), Butylene Glycol, PEG-8 Dimethicone, Propanediol, Caprylyl Methicone, Dimethicone, Parachlorella Beijerinckii Exopolysaccharides, Phloretin, Ergothioneine, Copper Palmitoyl Heptapeptide-14, Heptapeptide-15 Palmitate, Epigallocatechin Gallate, Tocopheryl Acetate, Aspartic Acid, PCA, Disodium EDTA, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Lactic Acid/Glycolic Acid Copolymer, Polyvinyl Alcohol, Histidine, Phenylalanine, Arginine, Ascorbic Acid, Octyldodecanol, Pyridoxine HCl, Retinyl Palmitate, Silica, Sodium Propoxyhydroxypropyl Thiosulfate Silica, Glycerin, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Ammonium Acryloyldimethyltaurate/VP Copolymer, Pentylene Glycol, Isohexadecane, Adenosine Triphosphate, Hydrolyzed Oat Protein, Niacinamide, Citric Acid, Polysorbate 60, Sorbitan Isostearate, Sodium PCA, Sodium Phytate, Sodium Lactate, Sodium Benzoate, Potassium Sorbate, Phenoxyethanol.

NOTE: The Incidecoder have a full ingredient breakdown HERE

Texture: It’s a nice, lightweight (almost watery) gel serum that melts into the skin.

Layering issues?: No.

Oily or Greasy?: No.

Sticky?: No.


Does this Sting if the Skin has been Irritated / Sensitised by Shaving/Heavy Retinol Use?: No

Summer or Winter?: I use this as a Moisturiser in the Summer due to the Gel-Cream feel. Dry skins could enjoy this any season.

Layerable?: Yes


Video Swatch:

As you can see this is a lightweight serum!

Fragrance?: No added Fragrance + EO (This does have a bit of a ”chemical” scent to it)

Good Under Makeup?: Seems to be fine

Will I use until Completion?: Yes. This is completed (took me 3 months to empty of almost daily use.

The Effect?: Fortified Skin + also relatively moisturised skin.

Support the Blog!

Giving a donation really helps with the maintenance of the blog! any money made will go towards purchasing products for review!


What I like:

  • Packaging that you can travel with (also lightweight packaging)
  • Lightweight
  • Fragrance + EO Free
  • Didn’t worsen my skin
  • I like the cocktail of skin-beneficial ingredients (less to think about since it’s all in there)

What I don’t like:

  • Expensive
  • Not sure about the % of these actives included, so I would still use Retinol + Vitamin C products separately on the side.

Overall Rating and Conclusion: 4 (nearly a 3.9)/5 – I liked this product! I’m unsure as to whether it’s worth the £80 price tag however. I think if you can afford it and you’d like a nice skin-barrier boosting and protecting serum, then this is a nice addition (not solution). However if you are willing to purchase serums separately i.e. Vitamin C Serum, a Niacinamide Serum + a retinol serum, you could go for that (also you would know the % of actives included, whereas with this, you don’t). I did enjoy using this and have now finished using this without any issues.

Would I purchase?: I think it’s too expensive for the effect.

Dupe?: Another product that aims to rebuild + restore + fortify the skin’s barrier is the Isntree Bifida Ampoule (Link HERE). It does have a different texture (that is a watery serum. And I do not recommend using when the skin is sensitised by heavy retinol use).

My Skin Type: I am acne prone and have slightly dehydrated combo skin. My skin is usually tight where the cheeks and eye area is and the outer parts of my face. My T zone is oily. My skin isn’t a fan of thick/heavy formulas so I opt for lightweight formulas to prevent it from clogging up. My skin doesn’t like essential oils either and I try to avoid fragrance when I can.

Disclaimer: I am a skincare enthusiast and not a skin expert. I am not qualified to give out dermatological advice. This type of advice should only be given by a medical practitioner. Upon trying / using any of the reviewed products on the blog, please follow the manufacturer’s instructions and warnings and please seek medical advice if needed.

Follow me on IG for Updates!

Note: I earn a small commission when you purchase through affiliate links, which helps me purchase products for review + also help improve the Blog! If you would like to support me, thank you ever so much! and if not, that’s fine – I hope you enjoy my posts! 


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s