I sent this $92 serum to a lab because “microbiome-friendly” is the new “clean” — everyone claims it, nobody proves it.
The results came back with zero red flags. But here’s the thing nobody tells you: a clean label doesn’t mean the product actually does anything for your skin.
Symbiome Biome Boost Serum, $92 for 30ml. The claim that got me: “prebiotic ferment that feeds your skin’s native bacteria.” Sounds fancy. Smells like it too — think kombucha’s earthy cousin.
Lab-verified pH
Sits at 5.2 — right in your skin’s happy zone, so it won’t wreck your acid mantle
No fragrance, no dyes
The “fermented” smell is real. It’s not pretty. It’s honest.
Third-party tested
Heavy metals, pesticides, and 40+ contaminants — all clear. That’s rare.
Photo: Fleur Kaan / Unsplash
The hero is a lactobacillus ferment filtrate — basically dead good bacteria that your skin flora eats for breakfast. Plus a peptide complex that’s been around forever but works.
- Lactobacillus Ferment: Feeds good bacteria, starves the bad
- Sodium Hyaluronate: Hydration that actually penetrates
- Tetrapeptide-21: Calms redness without being a steroid
- Glycerin: Old reliable humectant, nothing fancy
Photo: Mockup Free / Unsplash
It’s watery — like a thin toner, not a serum. Absorbs in 10 seconds flat. No tacky film, no pilling under sunscreen. My skin felt tight-clean for about an hour, which freaked me out at first.
Week two: the weird part. My usual chin breakouts didn’t disappear, but they healed faster — like 3 days instead of 7. My barrier felt less angry after using adapalene. Not a miracle, but a solid sidekick.
Photo: Alexandru Zdrobău / Unsplash
Redness down maybe 20%. Pores look the same — sorry, no pore eraser exists. Texture got slightly smoother by week 3, nothing dramatic.
Photo: Rosa Rafael / Unsplash
It’s genuinely clean — lab confirmed — but “clean” and “necessary” are different questions. I’d buy it again on sale, not full price.