Oxybenzone is a crucial sunscreen ingredient to avoid, as it is often found in chemical sunscreens and is considered the most toxic.

Another common UV light absorber found in sunscreens, octinoxate has also been linked to coral bleaching and can harm marine life. It decrease corals’ defenses against bleaching, damaging their DNA and hurting their development.

In humans, it can cause allergic reactions and skin irritation.

Octocrylene: This chemical is used to stabilize other UV light absorbers in sunscreens. It has been found to produce free radicals that can potentially damage cells.
It is harmful to the environment and can cause damage to coral reefs.

4-Methylbenzylidene Camphor is a chemical sunscreen agent that protects in the UVB range. Regarding its safety, we do not have the best news. Two possible concerns are that it absorbs into the body and might have some estrogenic activity there and it is known to be harmful to the environment and can cause damage to coral reefs.

Here’s the biggest name on the naughty list: parabens.

Parabens are preservatives commonly used in cosmetic products. They are highly used as effective preservatives in many products, including shampoos, moisturizers, tanning products, makeup, and toothpaste.
Parabens have been linked to skin irritation, causing rashes, blisters, and burning skin, particularly in those with allergies. Additionally, parabens are harmful to the environment, as they have been found to kill coral and have been detected in bodies of water. They can also contribute to the spread of viral infections among coral reefs.

When it comes to studying the label of your products the names to look out also for are butylparaben, methylparaben and propylparaben.