Eating too many Brazil Nuts can cause some side effects such as Garlic breath or other bad breath.
However there's really no other harm to your health for eating too many Brazil Nuts.
Eating at least 2 Brazil nuts per day can help prevent lung cancer and Brazil nuts are also healthy for you in other ways too.
However I forgot to mention that for some people if they do eat more than 6 Brazil nuts in a day everyday then they could get radiation poisoning so some people could be harmed if they eat too many Brazil nuts in a day.
Brazil Nuts when eaten in moderation though could improve your health overtime.
Brazil nuts contain Selenium, iron, calcium, magnesium, potassium, and sodium.
Brazil nuts also contain small amounts of vitamins such as thiamin, niacin, riboflavin, and vitamin B6 which is all good for boosting your health.