The toxicity of skincare products from big companies can vary significantly, depending on the ingredients they use. While many mainstream skincare products are formulated to be safe and effective, there are concerns about certain ingredients that may pose health risks. Here are some key points to consider:

1. Regulation and Safety Standards:

   - In the United States, the Food and Drug Administration (FDA) regulates skincare products, but the regulation is less stringent compared to pharmaceuticals. The FDA does not pre-approve cosmetic products and their ingredients, except for color additives.

   - The European Union has stricter regulations, banning or restricting over 1,300 substances from use in cosmetics.

2. Common Controversial Ingredients:

   - Parabens: Used as preservatives, parabens have been linked to hormone disruption. Some studies suggest they may mimic estrogen and potentially contribute to breast cancer, though the evidence is not conclusive.

   - Phthalates: Often used to increase flexibility and softness in products, phthalates have been associated with endocrine disruption and reproductive toxicity.

   - Formaldehyde and Formaldehyde-releasing Agents: Used as preservatives, these compounds are known carcinogens and can cause skin irritation.

   - Sodium Lauryl Sulfate (SLS) and Sodium Laureth Sulfate (SLES): These surfactants can cause skin irritation and may be contaminated with carcinogenic byproducts.

   - Fragrance: The term "fragrance" can encompass a wide range of chemicals, some of which may cause allergic reactions, skin irritation, and potentially more severe health issues.

   - Triclosan: An antimicrobial agent that has been linked to hormone disruption and antibiotic resistance.

3. Studies and Reports:

   - Research has shown that certain chemicals in skincare products can be absorbed through the skin and may have systemic effects.

   - Environmental Working Group (EWG) and other watchdog organizations provide databases where consumers can check the safety of specific products and ingredients.

4. Consumer Awareness and Trends:

   - There is growing consumer demand for "clean" and "natural" beauty products, leading many companies to reformulate their products without controversial ingredients.

   - Certifications and labels like "organic," "non-toxic," and "free from" certain chemicals are becoming more common, though it's important to verify these claims through credible sources.

5. Long-term Exposure and Vulnerable Populations:

   - Long-term exposure to certain ingredients, even at low levels, can accumulate and potentially pose health risks.

   - Children, pregnant women, and individuals with preexisting health conditions may be more vulnerable to the effects of toxic ingredients.

While not all skincare products from big companies are toxic, it's crucial for consumers to be informed and vigilant about the ingredients in their products. Reading labels, researching ingredients, and choosing products from reputable brands committed to safety and transparency can help minimize potential risks.