Which scenario most clearly indicates a person should consult a healthcare professional about vitamin supplementation?

Someone who eats a balanced diet high in fruits and vegetables and occasionally takes a standard multivitamin but has no symptoms or chronic medical conditions.

A person taking multiple high-dose vitamin supplements, especially fat-soluble vitamins, who also has a chronic medical condition or is on prescription medication that might interact with supplements.

A person who relies exclusively on fortified snack bars and never reports any symptoms or concerns to anyone, because absence of symptoms guarantees safety.

A young adult who never consults their physician and prefers self-prescribing complex herbal and vitamin regimens based only on social media recommendations.