Allan Nascimento, fondly known in the MMA world as “Puro Osso” (Pure Bone), was one of Brazil’s most resilient fighters. Born on 11 September 1991 in São Paulo, he grew up with a lean frame that earned him his famous nickname. Over the years, he transformed himself into a powerful athlete, mastering both Brazilian Jiu-Jitsu and Muay Thai, and eventually making his mark in the Ultimate Fighting Championship (UFC).
Nascimento’s journey was not just about victories inside the cage. It was about overcoming struggles, personal losses, and setbacks that tested his spirit. His story is one of determination, family love, and the pursuit of excellence. Sadly, his life was cut short when he passed away on 3 August 2026 at the age of 34, leaving behind his wife, two children, and countless fans who admired his courage.
Allan Nascimento Height, Age, Death, Family, BIO
| Attribute | Details |
|---|---|
| Full Name | Allan Nascimento |
| Nickname | Puro Osso (Pure Bone) |
| Profession | Mixed Martial Artist (MMA Fighter) |
| Known For | Competing in UFC Flyweight Division, Submission Specialist |
| Date of Birth | 11 September 1991 |
| Place of Birth | São Paulo, Brazil |
| Age at Death | 34 years |
| Date of Death | 3 August 2026 |
| Cause of Death | Heart Attack |
| Nationality | Brazilian |
| Height | 5 feet 9 inches (175 cm) |
| Weight Class | Flyweight (125 lbs / 57 kg) |
| Fighting Style | Brazilian Jiu-Jitsu (Black Belt), Muay Thai (Black Belt) |
| UFC Debut | October 2021 vs. Tagir Ulanbekov |
| UFC Record Highlights | Performance of the Night (2023 vs. Carlos Hernandez, 2025 vs. Cody Durden) |
| Other Titles | Gold Fight Flyweight Champion, Predador FC Bantamweight Champion |
| Family | Wife and two children; Mother Katia; Father (deceased, 2021); two brothers |
| Training Team | Chute Boxe Academy, B9 Academy |
| Coach | Diego Lima |
| Close Association | Trained with Charles Oliveira |
| Wikipedia | @Allan_Nascimento |
| @allanpuroosso/ |
Early Life and Childhood
Allan was born into a modest family in São Paulo. His father, who passed away in 2021, was a guiding force in his life, while his mother, Katia, provided constant support. He grew up with two brothers, sharing a close bond that shaped his values of loyalty and resilience.
As a child, Allan was often teased for being thin. His lean body earned him the nickname “Puro Osso”, which means “Pure Bone” in Portuguese. Instead of feeling discouraged, he embraced the name and turned it into a symbol of strength. This nickname followed him throughout his career and became a part of his identity in the fighting world.
Entry into Martial Arts
At the age of 15, Allan secretly began training in Muay Thai. He did not tell his parents at first, fearing they might disapprove of his fighting ambitions. But his passion for martial arts was undeniable. He spent hours in the gym, learning techniques, building stamina, and slowly shaping his body into that of a fighter.
Muay Thai was just the beginning. Allan soon discovered Brazilian Jiu-Jitsu, a discipline that matched his natural agility and lean frame. He trained rigorously, earning a black belt and mastering submission techniques that would later become his trademark in the UFC.
Professional MMA Debut
Allan Nascimento stepped into the professional fighting world in 2011, beginning his journey in Brazil. His debut fight was a test of both skill and courage. Unlike many fighters who take time to settle into the sport, Allan showed confidence from the start. His lean frame and sharp techniques made him stand out in the cage.
In those early years, he fought across different regional promotions, gaining valuable experience. Each fight added to his reputation as a disciplined athlete who relied on technique rather than brute strength. His victory against Elvis Guimarães in 2012 was one of the first signs that he was destined for bigger stages.
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Rise in Regional Circuits
Before entering the UFC, Allan built a strong record in regional circuits. He fought in promotions like Predador FC, Legacy FC, XFC International, Gold Fight, and Batalha MMA. These platforms gave him the chance to sharpen his skills against diverse opponents.
By the time he had completed this phase of his career, Allan had achieved an impressive record of 17 wins and 4 losses. His victories often came through submissions, showcasing his mastery of Brazilian Jiu-Jitsu. Fans began to notice his ability to stay calm under pressure and turn fights around with his technical skills.
Contender Series & Setbacks
In 2018, Allan got the chance to fight in Dana White’s Contender Series, a platform that often opens doors to the UFC. He faced Raulian Paiva, a tough opponent. The fight was close, but Allan lost by split decision. It was a heartbreaking moment, as he had hoped to secure a UFC contract.
This setback was followed by a series of cancelled fights and injuries. At one point, Allan struggled with depression, questioning whether he would ever reach the heights he dreamed of. Yet, he refused to give up. He continued training, working with his coaches, and waiting for the right opportunity.
UFC Career Highlights
Allan finally made his UFC debut in October 2021 against Tagir Ulanbekov. The fight ended in a split decision loss, but Allan’s performance was praised. His victory against Carlos Hernandez in 2023 came through a rear-naked choke, earning him the Performance of the Night award. In 2025, he defeated Cody Durden with an anaconda choke, securing his second Performance of the Night bonus.
Training with Charles Oliveira and the Chute Boxe Academy further strengthened his game. Allan became known for his technical fighting style, his calmness in the cage, and his ability to adapt to different opponents. His UFC journey was proof that persistence pays off, even after setbacks.
Personal Life
Away from the cage, Allan lived a simple and grounded life. Allan was married and blessed with two children, who were the center of his world. Despite the demanding schedule of a professional fighter, Allan always made time for his family. His relationship with his coach Diego Lima and his training at B9 Academy were equally important.
Allan was also known for his love of animals. He owned a pet dog and often shared moments of his life outside fighting with his close circle. His tattoos, spread across his arms, told stories of his journey and personal beliefs. Fitness was a constant part of his lifestyle, and he spent long hours in the gym, not only to prepare for fights but also to maintain discipline in everyday life.
Achievements and Legacy
Nascimento’s career was decorated with achievements that highlighted his skill and determination. He became the Gold Fight Flyweight Champion and the Predador FC Bantamweight Champion, proving his ability to dominate across different weight divisions.
In the UFC, Allan earned two Performance of the Night awards, one in 2023 against Carlos Hernandez and another in 2025 against Cody Durden. These victories showcased his submission skills and his ability to finish fights with precision. His black belts in Brazilian Jiu-Jitsu and Muay Thai added to his reputation as a versatile fighter who could adapt to any situation.
Death and Tributes
On 3 August 2026, Allan Nascimento tragically passed away in São Paulo at the age of 34. Reports confirmed that he suffered a heart attack while sleeping. His sudden death shocked the MMA community, as he was still an active fighter with many years ahead of him.
Tributes poured in from fans, fellow fighters, and coaches. Many remembered him not only for his skills but also for his humility and kindness. His training partner and friend Charles Oliveira shared heartfelt words, calling Allan a warrior who never gave up despite setbacks. The UFC community honored his memory, recognizing his contributions to the sport.
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