Veggies and frutas are a really good source. Grains and grilled comida are good options too. leite gives you calcium.
Just try to avoid eating a lot of doces and lixo food. I'm not saying quit them all together, but eat them in moderation:)
Healthy Food pipoca - Kettle milho is really good.
Crackers
Raw veggies and Fruit
Granola Bars
MultiGrain chips - Sunchips are a really good choice^^
Salads
Mixed Nuts
suco, suco de and Water
You might be able to find mais if you google a few healthy comida websites.
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