Brazil nut

The Brazil nut tree is very tall.

It lives in the Amazon rainforest. These trees can live for a long time. Some live for a thousand years!

The tree makes big fruit. The fruit has a hard shell. Inside the shell are the nuts.

The nuts look like orange slices.

Large bees visit the flowers. This helps the tree make fruit. Small animals like the agouti help too. They hide seeds in the ground.

These seeds grow into new trees.

The nuts are good to eat. They have things that keep us healthy. Most nuts come from the wild forest.

People use the wood for floors. They also use the oil for soap. The tree is very special.

The Brazil nut tree is a giant of the Amazon rainforest.

These trees can live for 1,000 years. They grow very tall and straight. Their branches reach high above other trees.

To make fruit, the tree needs help. Large bees visit the small flowers. These bees are the only ones that can pollinate the trees.

After pollination, a large fruit grows. It takes 14 months to mature. The fruit is a heavy, woody capsule. It can weigh as much as a coconut. Inside, many seeds are packed together. They look like the segments of an orange.

Animals like the agouti help the forest grow. The agouti gnaws the shell to eat seeds. It hides other seeds in the ground. These seeds can grow into new trees.

People harvest these nuts in the wild. In 2023, Brazil and Bolivia made 91% of the world's supply. The nuts are full of selenium. This is a tiny part of food that helps our bodies.

However, do not eat too many. Too much selenium can be bad for you. People also use the oil for soap and paint.

The Brazil nut tree is a true giant of the Amazon rainforest.

It is one of the largest and longest-lived trees in the forest. These trees can live for 500 years or even more. Some may even reach a thousand years of age. The trunk is very straight and grows tall without many branches. Most of the branches are high up in a large crown. This crown sits above the canopy of other trees.

There is a special way these trees make new seeds. First, large bees must visit the small, greenish-white flowers. Only certain large bees, like those in the genus Bombus or Xylocopa, can pollinate the flowers. This usually happens in pristine forests. After pollination, a large fruit grows for 14 months. The fruit is a heavy, woody capsule. It can weigh as much as a coconut. Inside, many wedge-shaped seeds are packed together like orange segments.

Nature helps the seeds find a place to grow. The fruit has a small hole at one end. Large rodents called agoutis use this hole to gnaw the shell open. They eat some seeds and bury others for later. These buried seeds can grow into new trees. This is how the forest stays full of Brazil nut trees. Capuchin monkeys have even been seen using stones to open the nuts.

People harvest these nuts from the wild in South America. In 2023, the world produced 75,910 tonnes of Brazil nuts. Brazil and Bolivia produced 91% of that total amount. Workers who gather the nuts are called castanheiros or castañeros. Most of the nuts come from wild harvests in tropical forests. This way of working helps people earn money without destroying the forest. However, logging is still a big threat to these trees.

Brazil nuts are very important for nutrition. They are a rich source of many things like magnesium and zinc. They are especially known for having a high amount of selenium. Selenium is a tiny part of food that is very important for our bodies. However, eating too much selenium can be toxic. A single serving of six to eight nuts has 544 micrograms of selenium. It is often best to eat only a few nuts at a time.

The Brazil nut, known scientifically as *Bertholletia excelsa*, refers to both a massive South American tree and its edible seeds. This tree belongs to the family Lecythidaceae. It is one of the largest and longest-lived species in the Amazon rainforest. Because it grows so large, it is a vital part of the tropical ecosystem. The tree is also a major commercial product. Its seeds are harvested for food, while its high-quality wood is used for construction.

As a tree, *Bertholletia excelsa* is a true giant. It can live for 500 years or even reach 1,000 years of age. The trunk is straight and often lacks branches for more than half its height. Above the surrounding forest canopy, it develops a large, emergent crown of long branches. The bark is smooth and grayish. Its leaves are oblong and broad, falling during the dry season. This structure allows the tree to reach sunlight that other trees cannot access.

The reproduction of the Brazil nut tree is a complex biological process. It relies almost entirely on pollination by large-bodied bees. These bees belong to genera such as *Bombus*, *Centris*, *Epicharis*, *Eulaema*, and *Xylocopa*. Because these specific bees need pristine forests to survive, the trees mostly reproduce in undisturbed habitats. After pollination occurs, the fruit takes 14 months to mature. The fruit is a large, woody capsule that can weigh as much as a coconut.

Inside the hard capsule, the seeds are arranged in a very specific way. There are between eight and 24 wedge-shaped seeds packed inside. They are organized like the segments of an orange. These segments can be stacked in up to three whorls. The polar ends of the middle whorl nestle into the upper and lower whorls. To reach these seeds, nature provides a way in. The capsule has a small hole at one end. Large rodents called agoutis gnaw this hole to access the seeds.

Agoutis play a critical role in the life cycle of the tree. They eat some seeds and bury others in caches for later use. Some of these buried seeds eventually germinate into new saplings. These young trees often stay in a state of dormancy for years. They must wait for a larger tree to fall so sunlight can reach them. This relationship between the rodent and the tree helps maintain the forest. Interestingly, capuchin monkeys have also been observed using stones as anvils to crack the nuts open.

Brazil nut production is a major global industry centered in South America. In 2023, the world produced 75,910 tonnes of Brazil nuts in their shells. Brazil and Bolivia are the most important producers, accounting for 91% of the world total. Most of these nuts come from wild harvests rather than plantations. Migrant workers known as *castanheiros* or *castañeros* gather the nuts. This method is an economic model that allows people to earn money without destroying the forest. However, intense gathering can be a threat. If too many seeds are taken, there are not enough left to replace old trees.

From a nutritional standpoint, Brazil nuts are incredibly dense. They consist of 66% fats, 14% protein, and 12% carbohydrates. They are a significant source of magnesium, phosphorus, and zinc. Most notably, they are famous for their high selenium content. A single 28g serving contains about 544 micrograms of selenium. This is ten times the Daily Value of 55 micrograms. Because selenium is toxic in large amounts, experts suggest eating only a few nuts at a time to avoid selenosis.

Beyond food, the Brazil nut tree has many other uses. The wood is prized for carpentry, flooring, and heavy construction. The oil from the nuts is used as a lubricant for clocks. It is also used in making paints, soaps, and perfumes. The hard shells can be pulverized to create an abrasive for polishing metals and ceramics. Even the charcoal from the shells can be used to purify water. This makes the tree a highly versatile resource for both humans and the environment.