Liesilica appears to be a misspelling or typo. If you meant "silica," it’s important to clarify the type of silica being discussed, as this can make a significant difference in terms of health implications.
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Crystalline Silica: Found in materials like sand, quartz, and certain types of stone, crystalline silica can be harmful when inhaled as dust. Long-term exposure is associated with serious respiratory conditions, including silicosis and lung cancer.
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Amorphous Silica: This form is generally regarded as safe and occurs in various consumer products, including dietary supplements and food items. It is non-toxic and is often used as an anti-caking agent.
If you were referring to something else, please provide more context! Always consult with a healthcare professional regarding concerns about substances and their effects on health.