What's really in
your beauty product?
Enter any cosmetic or skincare product and receive an honest 0–10 Purity Score based on ingredient safety, quality, transparency, and ethics — not marketing.
Analyzed against The Purity Standard's 5 pillars
Evaluating ingredients against The Purity Standard…
9.5–10: Gold Standard
9–9.4: Excellent
8–8.9: Very Good
7–7.9: Good
6–6.9: Fair
<6: Concerns
The Science Behind the Standard
Every deduction in the Purity Score is grounded in peer-reviewed research from medical journals, regulatory agencies, and toxicology studies worldwide.
Why the Standard flags parabens: Parabens are among the most widely studied preservatives in cosmetics. Multiple independent research groups across Europe, Asia, and North America have documented their ability to interact with the body's hormone system — particularly estrogen and thyroid receptors — at concentrations relevant to daily cosmetic use.
PubMed
Parabens and Their Effects on the Endocrine System
Parabens bind to estrogen, androgen, mineralocorticoid, progesterone, glucocorticoid, and thyroid receptors. Researchers found they disrupt the biosynthesis and biotransformation of natural hormones. In women, elevated paraben body burden correlates with disrupted estradiol-to-progesterone ratios; in men, interference with testosterone levels has been documented.
→ PubMed PMID: 29596967
PubMed
Assessment of Thyroid Endocrine Disruption Effects of Parabens Using In Vivo, In Vitro, and In Silico Approaches
Paraben exposure reduced thyroid hormone levels and disturbed transcriptional expressions in the hypothalamic-pituitary-thyroid axis. Butylparaben showed the highest developmental toxicity, causing mortality, reduced body length, lowered heart rate, and malformation in zebrafish models. All tested parabens exhibited thyroid receptor agonistic activity.
→ PubMed PMID: 34930008
Systematic Review
From Oxidative Stress to Male Infertility: Endocrine-Disrupting Chemicals and Semen Quality
Meta-analysis of 25 studies found correlations between urinary paraben concentrations and decreased sperm count, reduced motility, and sperm DNA damage. Higher urinary bisphenol levels showed significant impairment of semen quality and increased DNA damage — underscoring cumulative risk from daily cosmetic use.
→ PMC9405245
PubMed
Possible Endocrine Disrupting Effects of Parabens and Their Metabolites
After dermal absorption, parabens are hydrolyzed and their metabolites may drive endocrine disruption. The safety margin for propylparaben is described as "very low" when comparing worst-case exposure to no-observed-effect levels in children — with the estrogenic burden potentially exceeding that of endogenous estradiol during childhood.
→ PubMed PMID: 20381602
Why the Standard flags phthalates: Phthalates are plasticizers and fragrance-fixers found in countless cosmetics and personal care products. They are classified as endocrine-disrupting chemicals by the EU under REACH regulations, and several have been banned from children's products globally. Research consistently links them to reproductive harm in both males and females.
Systematic Review · MDPI
A Systematic Literature Review of Reproductive Toxicological Studies on Phthalates
Comprehensive review confirming phthalate exposure is associated with hormonal disruption, impaired gonadal function, and reproductive harm. Male exposure during puberty correlates with sperm quality decline in adulthood. In women under 35, phthalates decrease antral follicle count. The EU has classified DEHP, DBP, DiBP, and BBP as substances of very high concern under REACH.
→ PMC12469734
PubMed · ScienceDirect
Exposure Risks to Phthalates via Cosmetics and Personal Care Products in Pregnant Women
Pregnant women who use cosmetics — especially lipstick, deodorants, and nail polish — show the highest phthalate exposure levels. Health risks in early life include hormonal disorders affecting cholesterol, thyroid, estrogen, and androgen systems, as well as liver, kidney, and thyroid toxicity, premature birth, miscarriage, low birth weight, and early puberty.
→ PubMed PMID: 41138964
PMC · NIH
Phthalate Exposure and Long-Term Epigenomic Consequences
Phthalates can pass through the placental barrier and affect the developing fetus. In vitro and in vivo studies confirm endocrine-disrupting activity and moderate reproductive/developmental toxicity. The review highlights possible transgenerational effects — meaning harm to children of exposed mothers — and multigenerational consequences from phthalate exposure at any life stage.
→ PMC7218126
NIH StatPearls
Phthalates Toxicity — StatPearls
The EU temporarily banned six phthalates from children's toys in 1999; the US followed in 2008. The EU has further restricted low-molecular-weight phthalates — including DEHP, DBP, and BBzP — from cosmetics under European authorities. High phthalate exposure from cosmetics is specifically linked to lower SHBG levels in pregnant women using hair and cosmetic products.
→ NIH Bookshelf NBK587442
Why the Standard flags synthetic fragrance: The single word "fragrance" or "parfum" on an ingredient label can legally hide a mixture of hundreds of undisclosed chemicals. Research published across dermatology, toxicology, and oncology journals identifies synthetic fragrance compounds as among the top global allergens — and links them to endocrine disruption, respiratory harm, and cancer risk.
PubMed · Frontiers
The Impact of Perfumes and Cosmetic Products on Human Health: A Narrative Review
Comprehensive review of literature from 2005–2025 confirmed that synthetic chemicals in perfumes and cosmetics — particularly phthalates, parabens, and VOCs — are associated with allergies, respiratory issues, endocrine disruption, reproductive problems, and potential cancer risk. Heavy metals in cosmetics also pose significant documented health risks. The authors call for greater ingredient transparency and regulatory reform.
→ PMC12425936
Frontiers · Environmental Science
A Review of Environmental and Health Effects of Synthetic Cosmetics
Fragrances are identified as major allergens capable of triggering contact dermatitis, eczema flare-ups, and asthma exacerbation. The review also notes that certain cosmetic carcinogenic chemicals are routinely introduced to the market without adequate consumer notification, given the speed of new product launches and limitations of current ingredient safety monitoring.
→ Frontiers in Environmental Science
Breast Cancer Prevention Partners
Fragrance Chemicals and Carcinogenic Risk — Right to Know Report
IFRA's published list of 4,000 possible fragrance ingredients includes chemicals classified as carcinogens by California's Prop 65 Program and the National Toxicology Program — including benzophenone, methyleugenol, and styrene. Lab testing of 100 personal care products found probable carcinogens and endocrine disruptors including beta-myrcene, benzophenone, DEHP, oxybenzone, and galaxolide — none labeled on packaging.
→ BCPP Fragrance Research
PMC · NIH
The Dark Side of Beauty: Health Hazards and Toxicological Impact of Synthetic Cosmetics
Studies show that individual cosmetic chemicals with low carcinogenic potential can combine within a single formulation to produce unexpectedly elevated cancer risk — a "cocktail effect" not tested for in standard ingredient safety reviews. With 90% of individuals using personal care products daily, cumulative low-level exposure presents a public health concern that individual ingredient testing does not capture.
→ PMC11381309
Why the Standard flags petroleum-derived ingredients: Petrolatum (petroleum jelly) and mineral oil are byproducts of crude oil refining. While fully refined pharmaceutical-grade petrolatum is considered safe by most regulatory bodies, the EU requires documented proof of non-carcinogenic refinement — a standard the US does not mandate. Unrefined or partially refined versions can be contaminated with polycyclic aromatic hydrocarbons (PAHs), recognized probable carcinogens. The Standard favors natural, plant-based alternatives that don't carry this risk.
EU Regulation
EU Cosmetics Regulation — Petrolatum Refinement Requirement
The EU mandates that petrolatum used in cosmetics must have its full refining history documented, proving the source material is not carcinogenic. If this proof cannot be provided, the petrolatum batch cannot legally be sold in EU cosmetics. This standard does not exist in the United States, where petrolatum's refinement status is not required to be disclosed.
→ EU Cosmetics Regulation Analysis
Journal of EADV · Wiley
Mineral Oils and Waxes in Cosmetics: An Overview Based on Current European Regulations
The carcinogenicity of a mineral oil mixture is directly related to its MOAH content — specifically PAH compounds classified as carcinogenic and mutagenic by EFSA, JECFA, and IARC under CLP Regulation EC No 1272/2008. For lip care products with high oral exposure potential, Cosmetics Europe advises manufacturers to use only food-grade mineral oils meeting ADI specifications.
→ JEADV doi:10.1111/jdv.15946
BfR Germany
Highly Refined Mineral Oils in Cosmetics — Risk Assessment
The BfR measured MOAH content of 1.7–5% in petrolatum samples. While concluding that EU-compliant refined mineral oils pose no carcinogenic risk, the BfR flagged that PAH compounds within the MOAH fraction are of concern. The European Food Safety Authority (EFSA) and ANSES identified oral exposure to MOSH and MOAH — particularly via lip care products — as a potential human health concern warranting further restriction.
→ BfR Official Risk Assessment (PDF)
Why natural and organic ingredients score higher: The Standard rewards ingredients with documented clinical efficacy and favorable safety profiles. Decades of dermatological research confirm that plant-derived, naturally sourced, and organically farmed ingredients provide measurable skin benefits — without the toxicological trade-offs associated with many synthetic alternatives.
PubMed
Innovations in Natural Ingredients and Their Use in Skin Care
Clinical and laboratory studies over 20 years identified measurable benefits of natural ingredients across multiple skin conditions. Colloidal oatmeal and aloe vera demonstrated anti-inflammatory benefit for psoriasis and atopic dermatitis. Green tea, niacinamide, and feverfew proved efficacious for acne and rosacea. Licorice, arbutin, turmeric, and pomegranate showed antioxidative and hyperpigmentation-correcting activity.
→ PubMed PMID: 20626172
PubMed · JDD
Cosmetic Benefits of Natural Ingredients
Select basic science and clinical studies confirmed that mushrooms, feverfew, green tea, licorice, olive oil, soy, and coffee berry all demonstrate antioxidant properties with measurable benefit in the treatment and prevention of photoaging — one of the top concerns in dermatologic practice. These findings were validated in both in vitro and clinical human trials.
→ PubMed PMID: 25226001
Systematic Review · PMC
Evaluating Efficacy, Safety, and Innovation in Skin Care Applications of Essential Oils
Tea tree oil was particularly effective for acne treatment in clinical trials. Lavender and rosemary oils showed significant anti-inflammatory and anti-aging properties. Plant extracts from Matricaria chamomilla (chamomile) yielded positive results for skin health improvement. Multiple formulations — gels, creams, serums — demonstrated improvements in skin hydration, elasticity, and appearance with natural essential oil inclusion.
→ PMC12408269
PubMed Clinical Trial
Clinical Improvements in Very Dry Skin from a Natural Ingredient-Based Moisturizing Cream
A randomized clinical trial found that a natural ingredient-based moisturizer delivered results comparable to colloidal oatmeal benchmark products — significantly reducing transepidermal water loss, improving stratum corneum barrier function, and decreasing visual dryness and tactile roughness. Crucially, improvements persisted even after treatment cessation, suggesting a restorative rather than merely cosmetic effect.
→ PubMed PMID: 30005098
Why regulatory context matters in scoring: The ingredient standard this test applies is not arbitrary — it is informed by the world's most rigorous regulatory frameworks. The European Union, Health Canada, Japan, and Australia apply the precautionary principle to cosmetics: if a substance poses suspected risk, it is restricted until proven safe. The US operates inversely. This regulatory gap directly shapes which harmful ingredients still appear in products marketed to American consumers.
EU Regulation
EU Cosmetics Regulation (EC) No 1223/2009 vs. US FDA Cosmetics Framework
The FDA restricts or bans approximately 11 ingredients in cosmetics. The European Union has prohibited or restricted over 1,600 — a gap that shapes formulation, labeling, and safety documentation across the global beauty industry. The EU's approach requires manufacturers to demonstrate safety before a product reaches market. The US approach requires evidence of harm before an ingredient can be restricted.
→ EU vs US Regulatory Comparison
Campaign for Safe Cosmetics
The US–EU Cosmetics Safety Gap: A Public Health Perspective
"In 2004 when the EU adopted their Cosmetic Regulation that banned or restricted 1,100 chemicals from cosmetic products, the US Food and Drug Administration, in contrast, had only banned or restricted 11." The practical consequence is that American consumers are routinely exposed to chemicals that European regulators have determined pose unacceptable risks to human health — particularly to women of reproductive age and children.
→ Newsweek Coverage + Expert Source
NonToxicLab Analysis
FDA Regulation of Cosmetics: The Massive Gap You Should Know About
Even after MoCRA (2022) gave the FDA new cosmetic ingredient authority, the law still does not require premarket safety testing. "Clean beauty" remains a marketing term with no regulatory definition — some brands use the label while including ingredients banned in over 40 other countries. The burden of proof still falls on the FDA to prove a product is unsafe, rather than on the manufacturer to prove it is safe.
→ NonToxicLab FDA Analysis
EU · Health Canada · Japan
Global Precautionary Standards: EU, Health Canada, and Japan Cosmetics Regulation
Health Canada requires pharmaceutical-grade petrolatum for consumer products. Japan restricts phenoxyethanol to 1% maximum concentration. The EU bans animal testing in cosmetics (in force for 20+ years) and applies Annex II restrictions with full documentation requirements. The Purity Standard measures products against the most stringent global benchmark — not merely what is legal in the US market.
→ Global Regulatory Comparison
Sources include peer-reviewed publications indexed on PubMed/NCBI, the National Institutes of Health, Frontiers in Toxicology, the Journal of the European Academy of Dermatology and Venereology, the Breast Cancer Prevention Partners, and official regulatory documents from the EU, FDA, Health Canada, and Germany's Federal Institute for Risk Assessment (BfR). This research is presented for consumer education; it does not constitute medical advice.
The Purity Standard Test™ was created by PiperBlue Organic Makeup. Every product, including ours, is scored by the same criteria.
© PiperBlue Organic Makeup. All rights reserved.
© PiperBlue Organic Makeup. All rights reserved.