Insoluble fiber is a type of dietary fiber that does not dissolve in water. Found in foods like whole grains, nuts, vegetables, and wheat bran, it helps promote regular bowel movements and prevent constipation by adding bulk to the stool. Unlike soluble fiber, which forms a gel-like substance in the gut and can help lower cholesterol and blood glucose levels, insoluble fiber stays relatively intact through the digestive system. This characteristic aids in speeding up the passage of food and waste, contributing to a healthy digestive tract. Incorporating insoluble fiber into one's diet is beneficial for digestive health and can be part of a balanced diet to maintain or improve overall health. It's important to increase fiber intake gradually to allow the body to adjust, and to consume plenty of water.

Titanium dioxide is a versatile component found in various products. such as paints. sunscreens. and foods. It serves as a white pigment and offers UV protection. However. due to its strong chemical structure. removing it can be challenging. Thankfully. there are multiple methods available for removal depending on the specific situation. For instance. environmental cleansing can be achieved through photocatalytic degradation using UV light and catalysts to break down titanium dioxide in water. On the other hand. for skin care purposes. soap and water are sufficient for removing sunscreen with titanium dioxide. When dealing with fabric cleaners. an acidic solution proves effective in breaking down and eliminating residue.

Titanium dioxide is generally not considered dangerous and has been approved for use by the Food and Drug Administration in the USA. However, health concerns have been raised when it is in nanoparticle form due to its potential to interfere with the body's normal functioning. The International Agency for Research on Cancer classifies it as a Group 2B carcinogen, meaning it 'could be' a carcinogen to humans. Therefore, while the application of titanium dioxide in products like sunscreens, foods, and cosmetics are considered safe, inhaling it in its dust or powder form is not recommended.