What do the Clean, Low, Watch and Swap levels mean?

They are cut from a continuous concern level the app computes from the sourced claims that the chosen evidence lens shows: each claim counts its concern class, tier weight, confidence and dose relevance, combined worst-first with a decay so one serious finding outweighs many small ones, then scaled by how much of the substance reaches you in this use. Clean is below 0.35, Low below 1.1, Watch below 2.0 and Swap above that, on a 0 to 3 scale.

Is Methylparaben safe on skin (left on)?

Q: Is methylparaben safe on skin (left on)?

Under the app's default Cautious lens, methylparaben on skin (left on) rates Swap: the app would put this near the top of your swap plan. 4 sourced concerns count (restricted, consensus tier; endocrine, consensus tier; endocrine, emerging tier). This is research with sources, not medical advice.

Personal care1 use researched4 sourced claims

Where it turns up: common preservative against microbial growth. Detox My Life researched methylparaben under one use, because the same substance means something different in each use. Every claim below carries its evidence tier, how sure the research is that it applies here, and the sources it cites. The level is computed by the app's own deterministic engine, so the page says exactly what the app would.

Level by use and lens

Use	Mainstream	Cautious (default)	Based	Concerns · favour · fringe
On skin, left on	Swap	Swap	Swap	4 · 0

Mainstream shows consensus claims only; Cautious adds emerging research; Based adds fringe claims, labelled as such. The last column counts, under Cautious, the sourced concerns, the findings in its favour and the fringe claims Based would add.

Safer swaps: the app's swap catalog has no entry tied to this ingredient yet. When you scan a product that contains it, the app suggests cleaner alternative types for that product; the swap categories list what the catalog covers today.

On skin, left on Swap

Under the default Cautious lens methylparaben on skin (left on) rates Swap: the app would put this near the top of your swap plan. Mainstream (consensus only) rates it Swap; Based (adds the fringe) rates it Swap. Researched 2026-09-03.

Sourced concerns (4)

ConsensusRestrictedconfidence 100%

Methylparaben is restricted in cosmetic products in the European Union to a maximum concentration of 0.4% (as acid) when used alone, and up to 0.8% (as acid) for mixtures of paraben esters.

Why here: This restriction directly applies to dermal leave-on cosmetic products sold in the EU.
What would have to be true: Dermal application of cosmetic products containing methylparaben at concentrations up to 0.4% individually or 0.8% in mixtures.
The other side: The U.S. FDA does not currently regulate methylparaben with specific concentration limits in cosmetics, considering it generally recognized as safe at approved levels.

Sources the engine cites:

Final amended report on the safety assessment of Methylparaben, Ethylparaben, Propylparaben, Isopropylparaben, Butylparaben, Isobutylparaben, and Benzylparaben as used in cosmetic products - PubMed — nih.gov · regulator or public body
4 web articles (greenchemfinder.com, allanchem.com, bav-institut.de, …), linked in the app.

ConsensusEndocrineconfidence 100%

Methylparaben has been formally confirmed as an endocrine disruptor for both human health and the environment under European chemicals law (CLP hazard categories introduced by Commission Delegated Regulation (EU) 2023/707) by the French Agency for Food, Environmental and Occupational Health Safety (ANSES) in April 2026.

Why here: This classification applies to the substance itself, and thus to its use in dermal leave-on products, indicating a potential for endocrine disruption upon exposure.
What would have to be true: Dermal exposure to methylparaben in cosmetic products.
The other side: The U.S. FDA states that they do not have information showing that parabens as they are used in cosmetics have an effect on human health. The EU's Scientific Committee on Consumer Safety (SCCS) and the U.S. Cosmetic Ingredient Review (CIR) have not confirmed a meaningful endocrine disruption risk from permitted parabens at cosmetic-use concentrations.

Sources the engine cites (no regulator, review or study among them):

1 web article (greenchemfinder.com), linked in the app.

EmergingEndocrineconfidence 90%

Methylparaben is a potential endocrine disruptor due to its ability to weakly mimic estrogen, which has raised concerns about its link to health issues such as breast cancer and reproductive problems.

Why here: Parabens can be absorbed through the skin from leave-on cosmetic products, leading to systemic exposure.
What would have to be true: Daily and repeated dermal application of leave-on cosmetic products containing methylparaben.
The other side: Methylparaben's estrogenic activity is significantly weaker than natural estrogen (e.g., 2.5 million times weaker than estradiol). The U.S. FDA states there is no conclusive evidence that parabens as used in cosmetics are unsafe or affect human health. The Scientific Committee on Consumer Safety (SCCS) concluded in December 2023 that methylparaben is safe as a preservative in cosmetic products at concentrations up to 0.4%.

Sources the engine cites:

Review of the safety of application of cosmetic products containing parabens - PubMed — nih.gov (2020) · regulator or public body
3 web articles (puredermtx.com, chemicalbook.com, medicalnewstoday.com), linked in the app.
1 community or commercial page, not counted here.

EmergingEnvironmentalconfidence 80%

Studies suggest that parabens, including methylparaben, can accumulate in marine ecosystems and potentially harm wildlife by disrupting the endocrine systems of aquatic organisms.

Why here: While the primary exposure route for this use is dermal, the ingredient's presence in cosmetic products contributes to its release into the environment through wastewater.
What would have to be true: Release of methylparaben from cosmetic products into wastewater and subsequent accumulation in aquatic environments.
The other side: The SCCS's safety assessment for methylparaben in cosmetic products did not cover its safety for the environment.

Sources the engine cites (no regulator, review or study among them):

3 web articles (puredermtx.com, chemicalbook.com, medicalnewstoday.com), linked in the app.

Not researched here

The engine has no dossier for methylparaben when cooked with heat, in cold food, as a finishing ingredient, in heated food packaging or other uses. The app researches an ingredient for the use it infers from your product, so a scan fills these in; this page only shows what has already been researched and source-verified.

This is research, not medical advice. Detox My Life shows sourced claims sorted by evidence tier. It does not diagnose, treat, or tell you to start or stop anything. Talk to a qualified professional about your health.

Scan your own. The app reads any product label with your camera, works out how you are about to use it, and researches every ingredient for that use with live sources. Every scan adds to a Detox Score for your home, where 50 is a typical home in your region, and a plan of next swaps.

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