There are many nail polish brands available in the market, and some of them are marketed as non-toxic or natural. Here are some details about nail polish brands, including their ingredients, positive and negative aspects:

1. Essie: Essie is considered “3-free” (free of toluene, formaldehyde, and DPB), but it also has several ingredients that are not recommended. It is affordable, and some of its colors are long-lasting.

2. OPI: OPI nail polish contains solvents, film formers, plasticizers, UV absorbers/stabilizers, and colorants. OPI is "9-free," meaning that its formulas do not contain certain toxic chemicals. However, it still contains some ingredients that may be of concern.

3. Revlon: Revlon has a score of 3 and 6 on the EWG Skin Deep Cosmetic database, which is in the moderately hazardous category. It contains aluminum powder, which is not recommended.

4. 5-free nail polishes: These nail polishes are free of formaldehyde, dibutyl phthalate, toluene, formaldehyde resin, and camphor. Some examples of 5-free nail polish brands are Butter London, Zoya, and Deborah Lippmann.

5. Non-toxic nail polish brands: These nail polishes are formulated with fewer harsh chemicals. Some examples of non-toxic nail polish brands are Kure Bazaar, Côte, Olive & June, Huella, Sally Hansen GOOD.KIND.PURE, and Dazzle Dry.

6. Concerning ingredients: Some nail polish ingredients that may be of concern include acrylamide, benzophenone, BHA, carbon black, cocamide DEA, and di-n-butyl phthalate. These ingredients may be carcinogenic, endocrine disruptors, or developmental and reproductive toxins.

It is important to note that nail polish ingredients have undergone review by the Cosmetic Ingredient Review, which uses peer-reviewed scientific literature to determine safety. Consumers can look up specific ingredients at https://www.cir-safety.org/ingredients.