After reviewing multiple sources, here are some of the best non-toxic gel nail polish options available:

1. Manucurist Green Flash LED Gel Polish: This is a truly non-toxic gel nail polish that is free from harmful chemicals and has a no-damage formula that easily removes in 1 minute.

2. Modelones Non-Toxic Gel Nail Polish: This is a popular non-toxic gel nail polish brand that is sold on Amazon. It is a good option for anyone who wants to buy a non-toxic gel nail polish kit.

3. Kure Bazaar: This is a 10-free nail polish brand that is marketed as having long-lasting wear. It is also one of the most affordable options on the list.

4. Côte: This is another 10-free nail polish brand that is known for its long-lasting wear and beautiful colors.

5. Olive & June: This is a 7-free nail polish brand that is vegan and cruelty-free. It is also known for its easy-to-use brush and long-lasting wear.

When looking for non-toxic gel nail polish, it is important to avoid certain toxic ingredients such as formaldehyde, toluene, and dibutyl phthalate. Here are some of the ingredients to avoid:

• Dibutyl phthalate (DBP): This is considered an endocrine disruptor that may cause reproductive and other health concerns.

• Toluene: This is a neurotoxin that can affect the central nervous system and cause dizziness. It may also irritate the respiratory system and the skin.

• Formaldehyde: This is a known carcinogen that can cause cancer and other health problems.

It is also important to note that some non-toxic nail polish brands may still contain certain chemicals that are not considered safe. Therefore, it is always a good idea to read the ingredient list carefully before purchasing any nail polish product.