"Pagans" or non-baptized children are instead assumed to be at risk from bruxas (witches), that have malignant intention themselves rather than just mau-olhado. It probably reflects the Galician folktales about the meigas or Portuguese magas, (witches), as Colonial Brazil was primarily settled by Portuguese people, in numbers greater than all Europeans to settle pre-independence United States. Those bruxas are interpreted to have taken the form of moths, often very dark, that disturb children at night and take away their energy. For that reason, Christian Brazilians often have amulets in the form of crucifixes around, beside or inside beds where children sleep. Nevertheless, older children, especially boys, that fulfill the cultural ideals of behaving extremely well (for example, having no problems whatsoever in eating well a great variety of foods, being obedient and respectful toward adults, kind, polite, studious, and demonstrating no bad blood with other children or their siblings) who unexpectedly turn into problematic adolescents or adults (for example lacking good health habits, extreme laziness or lacking motivation towards their life goals, having eating disorders, or being prone to delinquency), are said to have been victims of mau-olhado coming from parents of children whose behavior was not as admirable. Amulets that protect against mau-olhado tend to be generally resistant, mildly to strongly toxic and dark plants in specific and strategic places of a garden or the entry to a house. Those include comigo-ninguém-pode ("against-me-nobody-can"), Dieffenbachia, espada-de-são-jorge ("St. Georges sword"), Sansevieria trifasciata, and Guiné ("Guinea"), Petiveria alliacea (the guinea henweed).
– "Ask the Rabbi" at Ohr Somayach
Meaning of the Evil Eye Myth