Omega-3 fatty acids, crucial for heart, brain, and eye health, come in ALA (plant-based), EPA, and DHA (fish-based) forms. Vegetarians primarily consume ALA, and the body's conversion to EPA and DHA is inefficient, potentially leading to deficiency. While not all vegetarians require supplements, they may be beneficial for those with low ALA intake or seeking direct EPA/DHA support. A balanced diet rich in ALA sources is key.