Despite eating a well-balanced diet, you might be at genetic risk for certain micronutrient deficiencies. Some genetic variants could be responsible for this, as the carrier of such variants may metabolize these nutrients inefficiently, leading to its lower levels in the body.
Other factors like your health and lifestyle could also influence your requirements. Therefore, it is recommended to consult a qualified nutritionist or a healthcare practitioner who can take a look at all these aspects before suggesting supplementation.