Fiber does not exactly "cancel out" carbs, but it affects how the body processes them. There are two types of carbohydrates in foods: digestible and non-digestible. Fiber falls into the non-digestible category, which means the body cannot break it down to use as glucose (sugar) for energy as it does with other carbs. When you subtract fiber from the total carbohydrates in food, you get "net carbs," which represent the digestible carbs that can affect blood sugar levels. This concept is particularly important in carb-restricted diets like the ketogenic diet, where the focus is on minimizing the intake of carbs that impact blood sugar and insulin levels. Thus, while fiber is a carb, its inability to be digested and converted into sugar means it doesn’t contribute to blood glucose the way other carbs do, making it less of a concern for those monitoring their carb intake for health reasons.

Dietary fiber, found mainly in fruits, vegetables, whole grains, and legumes, is essential for maintaining a healthy digestive system. It offers numerous health benefits, including aiding in weight loss by making you feel fuller for longer, thus reducing your overall calorie intake. Fiber also helps regulate blood sugar levels by slowing the absorption of sugar, beneficial for those with diabetes. Additionally, a high-fiber diet can lower cholesterol levels, reducing the risk of heart disease. Soluble fiber, in particular, has been shown to have a significant effect on lowering bad LDL cholesterol. Fiber aids in bowel regularity and prevents constipation by adding bulk to stools and facilitating their passage. Furthermore, diets high in fiber have been linked to a reduced risk of several cancers, especially colon cancer, due to the quicker elimination of waste from the body, thus reducing the time harmful substances stay in contact with the colon lining.

Titanium dioxide is a common pigment used to add whiteness and opacity to products like paints, plastics, papers, inks, foods, and some medications and vitamins. Its inclusion in vitamins serves primarily aesthetic purposes, enhancing their color and brightness. Regarding safety, the International Agency for Research on Cancer (IARC) has classified titanium dioxide as a Group 2B carcinogen, indicating it is "possibly carcinogenic to humans" based on limited evidence in animals and insufficient evidence in humans. However, this classification is mainly related to inhalation exposure, not ingestion. Regulatory bodies like the U.S. Food and Drug Administration (FDA) have approved the use of titanium dioxide in food, which includes its use in vitamins, considering it safe when used within prescribed limits. Despite its widespread acceptance and use, some individuals and health organizations advocate for caution, recommending minimizing exposure to synthetic additives, including titanium dioxide, when possible. As research evolves, so do recommendations, making it essential for consumers to stay informed about the latest safety evaluations.