Preston
Fortifying Tea Tree Shampoo, Leather
Shampoo
Cleaner pick · Safest cleansing we have rated
Africology Skincare & Spa
Bio Therapy Shampoo+43 on ingredient safety
250ml · 47.50 ZAR · 19 ZAR/100 ml
Ingredient safetyRaters agree
Ranked by safety only. Greenlens earns from qualifying purchases. Payout never affects a rating, a ranking, or the cleaner pick.
Raters split
Ingredient safety
A 58-point gap between the two loudest voices.
42Greenlens Precautionary ScreenIndependent
vs100Greenlens Tolerance ScreenIndependent
050100
See why, ingredient by ingredientAll 2769 cleaner options, safest first We show the best 12, including the strongest on each axis.
Every rater, every axis
Ingredient safety
58 pts apartA government authority. Auto-linked to this product, not yet human-reviewed. Checked this week. about this rater →
Independent — not funded by the brands it rates. Auto-linked to this product, not yet human-reviewed. Checked this week. about this rater →
Independent — not funded by the brands it rates. Auto-linked to this product, not yet human-reviewed. Checked this week. about this rater →
Independent — not funded by the brands it rates. Auto-linked to this product, not yet human-reviewed. Checked this week. about this rater →
Also screened, nothing found: ECHA SVHC Candidate List · EU Harmonised Classification (CLP Annex VI) · US NTP Report on Carcinogens · California Proposition 65 · ANSES Endocrine Disruptors · IARC Monographs
Recognized on a safer-ingredients list: US EPA Safer Choice recognizes 64% of ingredients as safer choices — a marker, never a score.
Environmental
Also screened, nothing found: EU Microplastics Restriction
Coverage & match quality
4 ratings · 1 of 4 axes
- Some ratings rest on an automatic match that has not been human-reviewed.
- Fewer raters reach smaller-brand products, so a missing rating is not a clean bill of health, only a gap.
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Environmentalno rating
No rater covers this axis for this product, so its weight can't move the score.
Laborno rating
No rater covers this axis for this product, so its weight can't move the score.
Packagingno rating
No rater covers this axis for this product, so its weight can't move the score.
0 means ignored. Higher = more weight in your composite.
Ingredients, decoded
Data availability
Robust14 of 14 characterized
Our sources have reference data on all 14 listed ingredients.
Worth a look (4)
Strong contact sensitizerflagged by 1 of 9 lists →
Undisclosed fragrance blendflagged by 2 of 9 lists →
Health Canada Hotlist — restrictedflagged by 1 of 9 lists →
- melaleuca alternifolia leaf oilcommon irritantfragrance materialperfuming · antioxidantraters disagree
Mild sensitizer for someflagged by 1 of 9 lists →
No flags in our sources (10)
What these ingredient tags mean (2)
These describe what an ingredient is, not whether it is a problem. The stance marks above are the ratings; these are not.
common irritantcocamidopropyl betaine, melaleuca alternifolia leaf oil
- cocamidopropyl betaine: A mild cleansing agent, but a recurring patch-test finding, usually traced to leftovers from how it is made. American Contact Dermatitis Society, Allergen of the Year 2004 (Fowler JF Jr, Dermatitis 2004;15(1):3-4).
- melaleuca alternifolia leaf oil: An essential oil whose oxidation products carry its sensitising potential; the EU assesses it as a moderate skin sensitiser. SCCS Scientific Opinion on Tea Tree Oil (CAS/EC 68647-73-4 / 285-377-1), SCCS/1681/25, adopted 30 October 2025, which concludes it is a moderate skin sensitiser. It does not set maximum levels of its own: it assesses the concentrations the applicant defended, and finds no concern at 2,0% in shampoo, 1,0% in shower gel, 1,0% in face wash and 0,1% in face cream, for oil conforming to ISO 4730:2017, in adults, in non-sprayable formats. It draws on the earlier SCCP opinions SCCP/1155/08 and SCCP/0843/04 and incorporates their data by reference; it says nothing about their status.
humectantglycerin
- glycerin: A humectant, and one of the two ingredients a comparison of moisturiser components found made a significant difference to skin hydration. FDA OTC skin protectant monograph, 21 CFR 347.10(h), lists glycerin as a skin protectant at 20 to 45%. On the humectant half: Jeong CB, Han JY, Cho JC, Suh KD, Nam GW, "Analysis of electrical property changes of skin by oil-in-water emulsion components", Int J Cosmet Sci 2013;35(4):402-410, DOI 10.1111/ics.12059, PMID 23621673, found that "glycerine and urea showed significant skin hydration effects compared with other humectants".