You know that moment when your skincare BFF texts you “drop everything, I found the one”? That’s me, right now, about hydration. Not a boyfriend. A serum.
Hyaluronic acid (HA) has been the it-girl of moisture for years, but she’s getting dethroned by a peptide that holds 4x more water per molecule. That’s not marketing math — that’s chemistry. And it changes how your skin drinks.
It’s TULA Skincare‘s 24/7 Hydrating Serum — $38 for 1 oz. The claim that made me roll my eyes and click “add to cart” simultaneously: “visible glow in 7 days.” Sure, Jan.
Polyglutamic Acid (PGA)
A peptide that holds 4,000x its weight in water — vs HA’s 1,000x.
Encapsulated HA
Time-released so you’re not just peeing out that hydration by noon.
Sodium PCA
A natural humectant that pulls water into the skin’s top layer like a magnet.
Photo: ibnu ihza / Unsplash
Here’s the weird part — PGA is bigger than HA. Like, molecularly huge. So it can’t penetrate deep. It sits on top and forms a water-trapping blanket while the smaller HA sneaks in underneath. They’re not competitors. They’re a team.
- Polyglutamic Acid: Surface-level water magnet that prevents transepidermal water loss
- Encapsulated Hyaluronic Acid: Slow-release hydration for deeper layers
- Sodium PCA: The unsung hero that keeps the moisture barrier flexible
- Glycerin: The old reliable nobody talks about but everything relies on
Photo: Amanda Wolbert / Unsplash
It’s a gel-water hybrid. Not sticky, not slippery — that weird in-between that absorbs in about 10 seconds. Zero fragrance. My skin felt like a cold glass of water was poured on it, but in a good way.
Week 2: I forgot to apply it one night and woke up with my usual forehead crepe. That’s when I knew it was actually working. The glow isn’t a “lit from within” fantasy — it’s just your skin not being dehydrated for once.
Photo: Ali Pazani / Unsplash
Fine lines around my eyes are softer (not gone — I’m not a miracle worker). My makeup sits better because there’s no dry patch roulette. But the biggest change? My skin doesn’t feel tight 20 minutes after cleansing anymore. That’s the real win.
Photo: Olga Ferstl / Unsplash
PGA is the future. HA had a good run, but this serum is what hydration actually feels like when it’s done right. Get it if you’re tired of moisturizers that lie.