Short answer: Zinc and Selenium should not be combined with other high-dose mineral supplements without medical advice — a direct, specific caution worth understanding.
Why this caution addresses cumulative dosing, not the formula alone
If you're already taking a separate multivitamin or mineral supplement, combining it with JellyFil could meaningfully increase your total zinc and selenium intake.
Why both minerals are named together in this specific caution
Zinc is involved in normal testosterone production, immune function and cellular repair, while Selenium contributes antioxidant properties and supports normal thyroid function — both genuinely important, but both risky in excess.
💡 Worth knowing: check your other supplements' mineral content before adding JellyFil to your routine.