Haeckels Plankton Serum: 30-Day Test Results

30-Day Test
I swapped my everyday serum for seaweed plankton extract for a month—my skin changed in ways I didn’t expect.
Expert Analysis · Honest Reviews · Real Results
1.📆Bye bye, boring serum

Day one I put literal seaweed goo on my face. Not the cute kind from a Korean sheet mask — this smelled like a low tide in Margate.

Three weeks later my skin stopped throwing tantrums. The redness I’d been covering with concealer for two years just… faded. Didn’t even notice until I ran out of concealer.

2.🧪What’s the deal

It’s Haeckels Plankton Serum — £65 for 30ml. The brand claims wild seaweed extract rebalances your microbiome. I rolled my eyes, then bought it because the bottle looks cool on my shelf.

1

Live plankton

Not dead extract — the stuff is literally alive when bottled. Weird but effective.

2

Zero water

Uses seaweed juice instead. Feels wasteful until you see what it does.

3

No preservatives

Smells like the ocean because it basically is the ocean. Keep it in the fridge.

white plastic tube bottle on brown and white marble table

Photo: Poko Skincare / Unsplash

3.📸What’s actually inside

Three ingredients do the heavy lifting. No filler nonsense. The formula is so stripped back it’s almost aggressive — in a good way.

  • Pelvetia canaliculata: calms angry skin in 48 hours
  • Laminaria digitata: holds 10x its weight in moisture
  • Ulva lactuca: boosts collagen production without stinging
  • Seawater: mineral bomb that replaces hyaluronic acid
white and brown plastic bottle

Photo: Nora Topicals / Unsplash

4.💧Texture report

Thin as water, dries in 90 seconds flat. Leaves a tacky film that disappears under moisturizer. First week I smelled like I’d been swimming — not great for date night.

Week two my pores stopped looking like craters. Week three my husband asked if I was wearing foundation. I was not.

💡

One Thing: Don’t rub it in. Press with palms — the heat activates the plankton. Rubbing kills the live culture.
red lipstick beside black box

Photo: Laura Chouette / Unsplash

5.🔬Did it actually work

Redness down 60%. Texture smoother. Oil production balanced for the first time since puberty. Still have blackheads though — it’s not magic.

Buy if
You have reactive skin that hates everything. Or you’re bored of hyaluronic acid.
⏭️

Skip if
You can’t handle smells. Or you want instant results — this takes 2 weeks minimum.
💰

Worth it?
Yes, but only if you finish the bottle. Half-using it is a waste of £65.
silhouette of boat on sea during sunset

Photo: Klemen Kuster / Unsplash

6.📊Final call

Best serum I’ve used this year. Weirdest texture. Worst smell. Most effective. I’ll buy it again.

8.5/10
Smells bad, works great, worth it
🛍️

Where to Buy: Direct from their site — they do a 15ml travel size for £35. Start there before committing.