Is it permissible to lie to one's father about taking vitamins that contain suspicious ingredients to avoid his anger and accusations of being overly strict, while attempting to use equivocation in the answer?

If it is proven that the pills are forbidden, then it is not permissible to use them, even if the father commands it. It is permissible to use allusions and circumlocution to avoid the father's anger. However, scrutinizing the ingredients of permissible medicines and foods is blameworthy and not among the praiseworthy acts of piety. The default rule is that they are permissible unless there is clear evidence or an apparent indication that they contain something forbidden. The European Council for Fatwa and Research has issued a fatwa permitting some substances dissolved in alcohol if the proportion is very small and consumed within the substance.