Calendula, Marshmallow, Manuka: What These Actually Do (Beyond Sounding Nice)

Most natural skincare lists pretty botanicals to make you feel something. We're not doing that.

The Everywhere Balm contains 15 botanicals. Each one is in the formula because it does a specific job. Calendula reduces inflammation. Marshmallow root forms a friction-reducing protective layer. Manuka oil provides gentle antimicrobial action. Together, alongside the other 12 botanicals, they support skin that's been compromised.

This is what those three actually do. The science, not the marketing.

Calendula officinalis: the anti-inflammatory workhorse

How it shows up in the formula

Calendula appears in the Everywhere Balm as Calendula-Infused Sunflower Oil at 10% of the formula. Calendula's anti-inflammatory actives are lipid-soluble, which means they're best delivered through an oil infusion rather than a water-based extract. The sunflower oil carrier is itself a high-linoleic-acid base that supports barrier function, so the carrier is doing work too.

Botanical background

Common name: pot marigold (not related to actual marigolds, confusingly). Used parts: flower heads. History: documented in European herbal medicine since at least the 12th century, with use traced to ancient Greece and Rome. The traditional applications were wound healing, skin inflammation, ulcers, and burns. The modern clinical literature has confirmed why.

Active compounds

Faradiol (a triterpene alcohol) is calendula's primary anti-inflammatory compound. It inhibits cyclooxygenase (COX) and 5-lipoxygenase pathways, which are the same targets as NSAIDs but through different mechanisms. It reduces pro-inflammatory cytokines (IL-1β, IL-6, TNF-α) without suppressing the immune function the body needs to actually heal.

Flavonoids (quercetin, isorhamnetin) provide antioxidant activity, scavenging free radicals from oxidative stress and supporting capillary integrity to reduce redness and swelling.

Saponins assist wound cleansing and have mild surfactant properties that help other compounds penetrate.

Carotenoids contribute antioxidant support and the characteristic orange tint that calendula gives to oil infusions.

What it does on compromised skin

Reduces surface inflammation without suppressing healing. This is the important part. You need some inflammation for healing. The problem is excessive, prolonged inflammation that creates the itch-scratch cycle, delays barrier recovery, and increases scarring risk. Faradiol modulates this rather than shutting it down.

Supports barrier lipid synthesis. Studies show calendula extract supports ceramide and cholesterol production in keratinocytes. These are the lipids that build your barrier matrix in the first place. So calendula is doing two jobs: reducing the inflammation that breaks the barrier down, and supporting the lipids that build it back up.

Promotes epithelialization (the formation and migration of new skin cells across compromised areas). This is useful for microtears, eczema flares, post-tattoo healing, and any situation where surface integrity is disrupted.

What calendula doesn't do

• It's not a cure. If you have severe eczema, psoriasis, or chronic dermatitis, calendula supports your skin. It doesn't replace medical treatment.

• It's not instant. Anti-inflammatory effects build over hours to days, not seconds.

• It can cause reactions. Calendula is in the Asteraceae family alongside ragweed, daisies, chrysanthemums, and chamomile. If you have severe ragweed allergy or documented Asteraceae sensitivity, patch test first.

Althaea officinalis (marshmallow root): the friction-reducing protective layer

How it shows up in the formula

Marshmallow root infused oil at 5% of the formula. Selected specifically for the mucosal benefits. Marshmallow's mucilage compounds make it one of the few botanicals genuinely tolerated on intimate and oral-adjacent tissue.

Botanical background

Common name: marshmallow (the candy was originally made from this plant, hence the name). Used parts: the root. History: traditional use in ancient Egypt, Greece, and Rome for soothing inflamed mucous membranes, persistent coughs, digestive irritation, and skin inflammation. The name comes from the marshes where it grows.

Active compounds

Mucilage is a polysaccharide complex that makes up 10 to 30% of marshmallow root content. When hydrated, it forms a viscous, gel-like substance. The molecules are large (40,000 to 200,000 Daltons), which means they stay on the skin surface rather than absorbing in.

Pectin is an additional polysaccharide that supports film formation and is hydrophilic (attracts water).

Flavonoids provide mild antioxidant activity that complements the calendula's anti-inflammatory work.

Asparagine, an amino acid, supports skin barrier function as a natural moisturising factor (NMF) precursor.

What it does on compromised skin

Forms a friction-reducing protective layer. This is what marshmallow is doing in the formula. Mucilage compounds create a thin, flexible layer that reduces friction between skin and fabric, holds moisture at the surface without occluding, and flexes with skin movement instead of cracking. Useful for friction zones (thighs, nipples, intimate skin), eczema patches that catch on clothing, post-shave irritation, and lip cracks.

Soothes itch and irritation. Mucilage has a cooling, calming effect on inflamed skin. The mechanism: physical coating reduces nerve ending exposure to irritants, plus mild anti-inflammatory compounds reduce histamine response.

Supports moisture retention without occlusion. Polysaccharides are hygroscopic (attract and hold water). But because the layer is semi-permeable, you get moisture support without the maceration risk of full occlusion.

What marshmallow doesn't do

• It's not a standalone healer. It supports surface comfort. It doesn't address underlying conditions.

• It's not for deep wounds. Surface support for barrier dysfunction, not medical wound care.

• Reactions are uncommon but possible. People with documented Malvaceae family allergy may react.

Manuka oil: the gentle antimicrobial

How it shows up in the formula

Manuka oil at 0.6% of the formula. To be clear, this is manuka oil (Leptospermum scoparium oil), not manuka honey. They come from the same plant but are completely different ingredients with different chemistry, different active compounds, and different applications.

The 0.6% is deliberate. It's the percentage where manuka oil provides antimicrobial activity without the warming sensation, scent intensity, or mucosal irritation that essential oils typically cause at higher concentrations. It's also the only essential oil derivative in the formula.

Botanical background

Source: Leptospermum scoparium, the manuka tree, native to New Zealand and parts of Australia. Used parts: leaves and small branches, steam-distilled to produce essential oil. Traditional use: Māori traditional medicine for wound care and infection support, with documented use predating European contact.

Active compounds

β-triketones (leptospermone, isoleptospermone, flavesone) are the primary antimicrobial compounds in manuka oil. These compounds are unique to Leptospermum species and have demonstrated activity against gram-positive bacteria including Staphylococcus aureus.

Sesquiterpenes (caryophyllene, humulene) provide anti-inflammatory activity at the molecular level.

These are different compounds from the methylglyoxal (MGO) found in manuka honey. Honey and oil are different products from the same plant. The botanical source is the same. The chemistry, processing, and topical applications are not.

What it does on compromised skin

Provides gentle antimicrobial pressure. Manuka oil's β-triketones reduce surface bacterial load without sterilising the skin. Skin needs some bacteria. The goal is reducing pathogenic load while leaving beneficial flora intact.

Modest anti-inflammatory action. Sesquiterpenes contribute to redness reduction at the percentage used in the formula.

Why not tea tree, oregano, or lavender for the antimicrobial role? Because at the concentrations needed for antimicrobial efficacy, those oils are too irritating for compromised, sensitive, or mucosal skin. Manuka oil at 0.6% provides workable antimicrobial pressure within the safety threshold for vulvar and oral-adjacent application.

What manuka oil doesn't do

• It's not an antibiotic. Don't use this to treat active infections. See a doctor.

• It's not manuka honey. Different ingredient, different mechanism. The botulism warning that applies to honey for infants under 12 months does not apply to manuka oil.

• It can cause reactions in essential oil sensitive individuals. Manuka is in the Myrtaceae family alongside tea tree. If you react to tea tree oil, you may react to manuka oil.

How these three work together

Individual ingredients are fine. Formulation is about how they interact.

Calendula reduces excessive inflammation, which prevents the chronic inflammatory cycle that delays healing. Marshmallow forms a protective surface layer that reduces further mechanical damage from friction. Manuka oil reduces pathogenic microbial pressure on compromised tissue.

Together: less inflammation, less friction damage, less infection risk. That's the brief these three botanicals fulfil within the 15-botanical formula. The remaining 12 ingredients (MCT oil, shea butter, jojoba, plantain, beeswax, squalane, vitamin E, monolaurin, bakuchiol, bisabolol, helichrysum CO2, plus sunflower as the calendula carrier) handle absorption, structural integrity, lipid matrix support, and treatment-grade actives.

The clinical evidence

Calendula

• Demonstrates COX-2 inhibition comparable to NSAIDs in vitro (Preethi et al., 2009)

• Supports keratinocyte proliferation and migration (Fronza et al., 2009)

• Accelerates epithelialization in clinical wound healing (Duran et al., 2005)

• Reduces radiation dermatitis severity in breast cancer patients (Pommier et al., 2004)

• Improves venous leg ulcer healing (Buzzi et al., 2016)

Marshmallow root

• Forms viscoelastic films with moisture-retaining properties (Boual et al., 2015)

• Demonstrates anti-irritant effects on inflamed mucosa (Deters et al., 2010)

• Stimulates human epithelial cells (Bonaterra et al., 2020)

Manuka oil

• β-triketone content demonstrates antimicrobial activity against gram-positive bacteria (Porter & Wilkins, 1998)

• Active against Staphylococcus aureus and methicillin-resistant strains (Christoph et al., 2000)

• Sesquiterpene content provides anti-inflammatory activity (Maddocks-Jennings et al., 2005)

Could you still react to these ingredients?

Yes. Individual immune response is individual. The honest disclosure for these three:

• Calendula. Asteraceae family. If you have severe ragweed allergy or documented Asteraceae contact dermatitis, patch test first or avoid.

• Marshmallow root. Malvaceae family. Reactions are uncommon. Possible if you have broad botanical sensitivities.

• Manuka oil. Myrtaceae family. If you react to tea tree oil, you may react to manuka oil. Patch test first if you have known essential oil sensitivities.

Patch test protocol: small amount on inner forearm, wait 24 hours, look for redness, itching, or rash. If you react: stop using, email hi@nooksbalm.com, full refund without justification.

The short version

Calendula reduces inflammation and supports barrier lipid synthesis. Marshmallow root forms a friction-reducing protective layer that's safe for mucosal skin. Manuka oil at 0.6% provides gentle antimicrobial pressure within the safety threshold for sensitive and intimate application.

Three of 15 botanicals in the Everywhere Balm. Each in the formula because it does a specific job.

Says very little. Does quite a lot.

Anhydrous, petroleum-free, fragrance-free. 15 botanicals working together. Shop the Everywhere Balm.

References

Preethi KC, Kuttan G, Kuttan R. Anti-inflammatory activity of flower extract of Calendula officinalis Linn. and its possible mechanism of action. Indian J Exp Biol. 2009;47(2):113-120.

Fronza M, et al. Determination of the wound healing effect of Calendula extracts using the scratch assay with 3T3 fibroblasts. J Ethnopharmacol. 2009;126(3):463-467.

Duran V, et al. Results of the clinical examination of an ointment with marigold (Calendula officinalis) extract in the treatment of venous leg ulcers. Int J Tissue React. 2005;27(3):101-106.

Pommier P, et al. Phase III randomized trial of Calendula officinalis compared with trolamine for the prevention of acute dermatitis during irradiation for breast cancer. J Clin Oncol. 2004;22(8):1447-1453.

Buzzi M, et al. Therapeutic effectiveness of a Calendula officinalis extract in venous leg ulcer healing. J Wound Care. 2016;25(12):732-739.

Givol O, et al. A systematic review of Calendula officinalis for wound healing. Wound Repair Regen. 2019;27(5):548-561.

Boual Z, et al. Mucilage from Althaea officinalis: chemistry and applications. Phytochem Rev. 2015;14(2):225-235.

Deters A, et al. Polysaccharides from marshmallow roots: stimulation of human epithelial cells. J Ethnopharmacol. 2010;127(1):62-69.

Bonaterra GA, et al. Anti-inflammatory effects of Althaea officinalis root extract. Front Pharmacol. 2020;11:290.

Porter NG, Wilkins AL. Chemical, physical and antimicrobial properties of essential oils of Leptospermum scoparium and Kunzea ericoides. Phytochemistry. 1998;50(3):407-415.

Christoph F, Kaulfers PM, Stahl-Biskup E. A comparative study of the in vitro antimicrobial activity of tea tree oils s.l. with special reference to the activity of β-triketones. Planta Med. 2000;66(6):556-560.

Maddocks-Jennings W, Wilkinson JM, Shillington D. Novel application of essential oils: an exploratory study of their use in pre-emptive infection control of an oncology unit. Complement Ther Clin Pract. 2005;11(2):113-117.

Reider N, et al. The seamy side of natural medicines: contact sensitization to arnica and chamomile. Contact Dermatitis. 2001;45(5):269-272.