My recommendation is use both MultipleSupplements BIOTIN COMPLEX and MultipleSupplements Mag Boost. Adding a good probiotic like MultipleSupplements PROBIOTIC is also beneficial. The Combination packs provide additional discounts. But feel free to mix and match any of these with dietary supplements you are already taking. Just be careful, some vitamins can be overdone more than others and consult a healthcare professional if unsure of which supplements should be mixed.
Note: Because of the potential for interactions, dietary supplements should not be taken with medication without first talking to an experienced healthcare provider.