What Does Mountain Glow Serum Do?

Barrier recovery, wrinkle smoothing, and radiance - powered by moss stem cells, lichen, and a clean, plant-based active complex.

Key Takeaways

  • Mountain Glow Serum uses MossCellTec No. 1 (biotechnological moss stem cells) and Star-Tipped Lichen to repair the skin barrier, reduce wrinkle depth, and restore radiance, with published research on these actives showing effects in as little as 14 days.
  • The formula contains 41 clean plant actives - including PHA, hyaluronic acid, vitamin E, and Honey Locust Seed - with no parabens, silicones, harsh alcohols, or synthetic fragrance.
  • Published research on the MossCellTec No. 1 moss active showed significantly improved skin hydration and TEWL at 14 days and reduced wrinkle depth at 4 weeks in placebo-controlled studies of the ingredient.
  • Mountain Glow suits a range of skin types including sensitive, combination, and mature, and avoids the actives most commonly flagged during pregnancy; consult a healthcare provider before use if pregnant.
  • Mountain Glow is priced below typical luxury anti-aging serums and is made by a B Corp with a B Impact score of 96.6.
Mountain Glow Serum repairs the skin barrier, smooths wrinkles, and restores radiance using biotechnological moss stem cells, wild-harvested lichen, and a full roster of clean plant actives, drawing on published research into its moss stem cell and lichen actives.
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What Ingredients Make Mountain Glow an Anti-Aging Serum?

Four hero actives do the heavy lifting, supported by a full cast of clean, plant-derived ingredients. Each active targets a specific skin concern.
  • MossCellTec No. 1 (Physcomitrella patens moss stem cells): The first biotechnologically produced moss active on the market. It activates the lamin A gene and RanBP17 - both down-regulated in aged skin - to support nuclear envelope structure and cellular transport. In placebo-controlled studies, 2% moss active delivered significant improvements in hydration, TEWL, and skin tone homogeneity after 14 days, and reduced wrinkle depth after four weeks.
  • Star-Tipped Lichen (Cladonia stellaris): Helps support the look of firmness and smoothness. In published research, nearly all tested lichen extracts inhibited elastase and whole extracts reduced collagenase activity - enzymes that break down skin structure - with broad anti-inflammatory action.
  • Honey Locust Seed polysaccharides: Provide mechanical skin-tightening properties that visibly minimize wrinkle appearance just 3 minutes after application, with effects lasting up to 8 hours.

Why Moss Stem Cells and Lichen Instead of Synthetic Actives?

Forest-found actives are the foundation of Ursa Major's formulation philosophy - not a marketing layer added on top. Co-founder Emily Doyle put it plainly in a Gear Patrol interview: 'We look at the mosses and lichens; we look at mushrooms and barks, herbs and flowers; the buds, the leaves; the entire anatomy of the forest.'
Mosses grow slowly and are often protected species, so harvesting them at scale is neither sustainable nor reliable. The solution: a sterile protonema culture of Physcomitrella patens grown in liquid culture under controlled laboratory conditions. This biotechnology produces the active reproducibly and sustainably, without touching wild populations. Physcomitrella patens has survived for over 400 million years by developing extraordinary adaptability - and that resilience is what makes its cellular extract effective on aging skin.
Lichen brings its own credentials: in published research, nearly all tested lichen extracts inhibited elastase, and whole lichen extracts (rather than isolated compounds) reduced collagenase activity, with anti-inflammatory COX-2 activity across most extracts. These enzymes are involved in breaking down skin structure. The soft, honeyed scent you notice in Mountain Glow comes entirely from real plant extracts - never synthetic fragrance.

Who Is Mountain Glow Serum For?

Mountain Glow is designed to work across skin types and to be gender-neutral from the start. Whether your skin is dry, mature, sensitive, combination, or normal, the formula is built to work without irritation.
  • Sensitive skin: No harsh alcohols, parabens, silicones, sulfates, or synthetic fragrance. Wild Indigo Seed actively reduces redness.
  • Mature skin: MossCellTec No. 1 and Star-Tipped Lichen target the structural causes of aging at the cellular level.
  • Considering pregnancy: Free of ingredients commonly avoided during pregnancy, such as vitamin A or high-dose salicylic acid. Consult a healthcare provider before use.
  • Men and anyone exploring clean grooming: Gender-neutral by design. Clean beauty for men is one of the fastest-growing segments in personal care.
  • Eco-conscious buyers: Ursa Major is a certified B Corp with a B Impact score of 96.6, Plastic Negative certified, and available at Ulta, Credo, and Heyday.

How to Use Mountain Glow and What Results to Expect

Apply 1-2 pumps AM or PM before your moisturizer. It layers cleanly into any existing routine. The timelines below reflect published research on the individual active ingredients, not clinical testing of the finished serum.
Timeline What the ingredient research shows Active studied
3 minutes Visible wrinkle minimization and tightening Honey Locust Seed polysaccharides
Up to 8 hours Sustained skin-tightening effect Honey Locust Seed polysaccharides
14 days Improved hydration, reduced TEWL, more even skin tone MossCellTec No. 1 (2% concentration)
28 days 2.4x redness reduction Wild Indigo Seed
4 weeks Reduced wrinkle depth (placebo-controlled study) MossCellTec No. 1

Is Mountain Glow Worth the Price?

Mountain Glow is priced well below comparable luxury anti-aging serums - a gap Emily Doyle built intentionally by sourcing natural forest actives over expensive synthetics. The density argument is straightforward: 41 actives, with clean certifications and B Corp accountability included.
Feature Mountain Glow
Price Below typical luxury tier
Key actives MossCellTec No. 1, Star-Tipped Lichen, Honey Locust Seed, Wild Indigo Seed, PHA, HA, Vitamin E
Total actives 41 clean plant actives
Clean certifications Vegan, cruelty-free, no parabens/silicones/sulfates/synthetic fragrance
B Corp certified Yes - B Impact score 96.6
Plastic Negative Yes

Frequently Asked Questions

What skin concerns does Mountain Glow Serum target?
Barrier recovery, wrinkle depth reduction, skin tone homogeneity, hydration, redness reduction, and overall radiance - all backed by published research on its individual moss stem cell and lichen actives. The full ingredient breakdown is available on the Ursa Major product page at ursamajorvt.com.
Is Mountain Glow Serum safe for sensitive skin?
Yes. It is formulated for all skin types including sensitive, with no harsh alcohols, parabens, silicones, sulfates, or synthetic fragrance. The soft honeyed aroma comes entirely from real plant extracts. Wild Indigo Seed actively reduces redness 2.4x after 28 days.
Can I use Mountain Glow Serum if I am pregnant?
Mountain Glow is free of ingredients commonly avoided during pregnancy, such as vitamin A or high-dose salicylic acid. Pregnancy needs are individual, so consult a healthcare provider before use.
How quickly does Mountain Glow Serum work?
Honey Locust Seed provides visible wrinkle minimization in 3 minutes, lasting up to 8 hours. Published research on the MossCellTec No. 1 ingredient itself shows improved hydration and skin tone homogeneity after 14 days and reduced wrinkle depth after 4 weeks.
What makes MossCellTec No. 1 different from other anti-aging actives?
It is the first biotechnologically produced moss stem cell active on the market, activating lamin A and RanBP17 genes that decline in aged skin. This cellular mechanism is distinct from retinol or peptide-based approaches. It is also sustainably produced without wild harvesting, since wild mosses grow slowly and are often protected species, which makes them impractical to harvest at scale.