The Ordinary HA 2% + B5 vs Geek & Gorgeous HA 5 Rich
A slightly embarrassing game of spot the difference
I’m reviewing these together because they are, quite honestly, much of a muchness. And I don’t mean that dismissively. I like them both. They are affordable, sensible hydration serums and they both deserve a place on The Shelf. I just couldn’t find a dramatic winner.
Believe me, I tried.
I compared which held its shape for longer, which felt more viscous, which absorbed faster and which left more tack behind. It became an embarrassingly serious investigation into two very similar bottles of clear serum.
What are we holding?
The Ordinary Hyaluronic Acid 2% + B5 with Ceramides is £8.80 for 30 ml.
Geek & Gorgeous HA 5 Rich is £8.95 for 30 ml.
Both are water-based and fragrance-free. Both contain panthenol. Both are designed primarily to support hydration. And both contain five forms of hyaluronic acid. Yes. Both. Geek & Gorgeous makes those five forms central to the product’s name and story, but The Ordinary’s updated formulation now also combines five forms across different molecular weights and structures. So the headline difference is not actually a difference at all.
What we recommend…
The Ordinary Hyaluronic Acid 2% + B5
A hydrating serum formulated with five forms of hyaluronic acid at varying molecular weights, alongside an HA crosspolymer and hydrolysed HA, providing hydration across multiple layers of the skin. Vitamin B5 supports the skin's natural barrier function, while added ceramides help lock in moisture. A lightweight, fragrance free option suited to most skin types, particularly where dryness or dehydration is a concern.
Geek & Gorgeous 101 HA 5 Rich
A hydrating serum containing five forms of hyaluronic acid across varying molecular weights, alongside panthenol and tremella mushroom extract to support moisture retention. The silky, non-sticky formula is designed for daily use and is particularly suited to normal, dry or dehydrated skin. Fragrance free and vegan.
Where do they differ?
Geek & Gorgeous combines its HA complex with glycerin, betaine, panthenol and Tremella mushroom extract. It is a nicely constructed humectant formula aimed particularly at normal, dry and dehydrated skin. The Ordinary combines its five HA forms with panthenol and ceramides.
The ceramides are the most interesting difference because they are involved in the lipid structure of the skin barrier and help reduce water loss. But let’s not overstate this. I would be happy just to say ‘The Ordinary feels slightly more barrier-conscious on paper’. It does not turn it into a leaking-bucket repair kit.
Hyaluronic acid is not an exfoliating acid
HA has the word acid in its name. If that still makes you think it exfoliates, please go back and read the ACIDS section. Its role here is hydration.
And wow, does it love water. If hyaluronic acid were a Disney princess, it would obviously be Ariel.
HA can bind a substantial amount of water, which helps the skin feel softer, smoother and temporarily plumper. But it needs water to work with. That matters.
Molecular size matters too
Native hyaluronic acid is an enormous molecule. It is far too large to casually wander through intact skin and start filling it from within. Higher-molecular-weight HA largely remains towards the surface, where it forms a hydrating film. Smaller and hydrolysed forms may interact differently with the stratum corneum, which is why brands often combine several molecular weights.
But “multiple molecular weights” should not be translated into “this serum travels deeply through every layer of the skin.”
That is marketing stretching beyond what the formulation can confidently promise. These are topical hydration serums. Good ones. But topical ones.
The leaking-bucket problem
I don’t think enough people talk about the fact that adding hydration to a compromised barrier can be like filling a leaking bucket. You can keep adding water, but if the structure responsible for holding it is impaired, you haven’t solved the whole problem.
The skincare world may have glorified HA a little too much. That feels like a terrible thing to say because HA is pretty epic. It does a wonderful job and remains a staple in my own routine. But hydration and barrier repair are not interchangeable phrases.
HA cannot replace the ceramides, cholesterol and fatty acids needed to support an effective skin barrier. Nor is it going to save you from all impending skin doom.
How I would use them
Apply a few drops to slightly damp skin, then follow with an appropriate moisturiser.
The serum provides humectancy. The moisturiser helps reduce water loss and provides the emollient or lipid support your skin may need. More is not better. Too much of either serum can leave the skin tacky and increase the chance of pilling.
The Shelf verdict
I like both. The Ordinary edges ahead for accessibility and the inclusion of ceramides, although I would not use that inclusion alone to make grand claims about barrier repair. Geek & Gorgeous offers a thoughtful combination of humectants and has a lovely silky texture, particularly for normal-to-dry dehydrated skin.
They do similar jobs for similar money. Not every comparison needs a dramatic winner. Sometimes two products are simply good formulations doing what they were designed to do.
Just don’t ask either of them to repair a leaking bucket single-handedly.
The difference: Smaller than either brand’s marketing department would probably like.
