Clinical Study: Saaren Taika Tea Tree Soap Maintains the Skin Microbiome & Is Suitable for Facial Cleansing

Clinical Study: Saaren Taika Tea Tree Soap Maintains the Skin Microbiome & Is Suitable for Facial Cleansing

Saaren Taika Tea Tree Soap has been clinically studied and shown to preserve the skin’s natural microbiome while reducing dryness and redness and improving radiance.
It is an excellent daily cleanser for sensitive, dry, itchy, or blemish-prone skin: it does not disturb the skin’s natural balance, yet it offers antibacterial and anti-itch benefits.

Clinically tested: Tea Tree Soap preserves the skin’s natural microbiome, reduces dryness and redness, and increases radiance.

In-Use Study Under Dermatological Supervision to Assess Microbiome Effects

Participants: 20
Age range: 19–75 (all 20 included)
Sex: Men and women
Skin types: All skin types

Method

Wash-out phase (7 days): Facial cleansing with a neutral cleanser; no other facial products.

Test product use: At home, 1–2 times daily (morning/evening) for 4 weeks (Day 0–27).

Tolerance

No clinical reactions attributable to the product.

No discomfort reported by participants.

Skin acceptability: Good.

Efficacy after 4 weeks

Statistically significant improvement in skin radiance.

Statistically significant reduction in redness.

Statistically significant reduction in skin dryness.

Microbiome analysis

Statistically significant decrease in Proteobacteria (consistent with the selective antimicrobial activity of tea tree oil and d-limonene).

No statistically significant increase in richness or diversity; overall microbiome diversity remained stable → the product preserves the natural skin microbiome.

What This Means

Tea Tree Soap cleanses effectively without harming the skin’s natural defenses.
The selective reduction of Proteobacteria indicates the soap can help rebalance the bacterial community without broad disruption of the microbiome.

High-Quality Ingredients, Gentle Yet Effective

Saaren Taika Tea Tree Soap is made from very high-quality, minimally processed oils that help maintain the skin’s moisture balance and preserve naturally occurring vitamins, antioxidants, and polyphenols—so your skin gets the most benefit.

The gentle formula supports the skin’s barrier while removing impurities and sebum, leaving skin fresh and balanced.

Dermatologically Tested

A dermatological study showed Tea Tree Soap significantly reduces impurities (such as blackheads and inflammatory blemishes) while maintaining the skin’s natural balance.

Clinically supervised study under a dermatologist

Suitable for daily facial cleansing

Study Design (Dermatologist-Supervised Clinical Study)

Objective:
To confirm skin compatibility after 4 weeks of repeated use in healthy volunteers, assess effects on the skin microbiome, and evaluate cosmetic efficacy (radiance, redness, dryness) under normal use.

Type:
Open, single-center clinical in-use study.

Test product:
Tea tree soap bar

Neutral cleanser (wash-out):
Cleansing liquid [XXX] Neutral

Population:
20 valid cases (22 enrolled), ages 18–75, men and women, all skin types.

Application:
Face, 1–2× daily for 4 consecutive weeks (D0–D27).
Standardized instructions for wetting, cleansing with a washcloth lathered on the bar, careful rinse with lukewarm water, and follow-up with usual toner/moisturizer.

Assessments at D0/T0 and D28

Tolerance: Dermatologist examination; participant-reported sensations/logs.

Efficacy:

pH (Skin-pH-Meter® PH 905, Courage & Khazaka)

Visual radiance/“glow” (technician-rated, 0–9 scale)

Redness (erythema) (dermatologist-rated, 0–4 scale)

Dryness (dermatologist-rated, 0–4 scale)

Microbiome: skin swab DNA sequencing (Eurofins Genoma) with standard indices (Observed OTUs, Chao1, Shannon).

Statistics: Normality (Shapiro–Wilk); paired two-tailed Student’s t-test or Wilcoxon as appropriate; significance at p < 0.05.

Overall conclusion

Good skin tolerance; no clinical signs attributable to the product; no discomfort reported.

Significant improvements in radiance, redness, and dryness at D28.

Microbiome preserved: diversity and richness stable; Proteobacteria decreased significantly (consistent with targeted antimicrobial action).

Participant appreciation

Product perceived as gentle yet effective, leaving skin hydrated, comfortable, soft, healthier-looking, and more radiant, with a pleasant texture and scent.

85% would continue using, 85% would purchase, 85% would recommend.

Ethics & compliance (high level)

Conducted in accordance with the Declaration of Helsinki, Good Clinical Practice (ICH E6 R2), EU Cosmetics Regulation (EC) No 1223/2009, EU Claims Regulation (EU) No 655/2013, and GDPR (EU) 2016/679.

Research center: Eurofins Cosmetics & Personal Care Italy Srl

Start date: 28 May 2024 • End date: 3 July 2024

Protocol: STUN724AA0120-1, v1 (26 Apr 2024)