Neanderthal growth hormone receptor increases muscle mass in people today, study shows

Phys · Aug 05, 2026 · 571 words · By Max Planck Society

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What to know about Neanderthal growth hormone receptor increases muscle mass in people today, study shows

A study published in Current Biology indicates that a Neanderthal-inherited variant of the growth hormone receptor is associated with increased muscle mass in modern humans. The research, involving laboratory cell tests and population data, found the effect becomes apparent after childhood and is more prevalent in South and East Asian populations.

Propaganda risk 0%

Claims checked 12

Techniques found 0

Topics 0

Coverage spectrum

Coverage gap: Low Left coverage

Left0%

Center67%

Right33%

3 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Neanderthal growth hormone receptor increases muscle mass in people today, study shows Sadie Harley Scientific Editor Robert Egan Senior Editor Neanderthals were generally more strongly built than most people living today.

Why it matters

Their bones show signs of large muscles, and they had characteristic features such as prominent brow ridges and relatively short tooth roots.

Common ground

Growth hormone helps shape the body by regulating the growth of muscles and bones.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Follow-up questions

What concrete event or decision sits underneath the headline: Neanderthal growth hormone receptor increases muscle mass in people today, study shows?
What evidence would most clearly confirm or weaken the claim that Increased signalling of the Neanderthal growth hormone receptor, Current Biology (2026). DOI: 10.1016/j.cub.2026.07.025?
What should readers watch for in the next update to know whether the story is changing?

open_in_new Read the original article: https://phys.org/news/2026-08-neanderthal-growth-hormone-receptor-muscle.html

analyticsAnalysis

Propaganda Score

confidence: 100%

Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 12 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 6

schedule Pending 2

verified Verified By Reference 2

info Single Source 1

help Insufficient Evidence 1

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Claim 1: “Increased signalling of the Neanderthal growth hormone receptor, Current Biology (2026). DOI: 10.1016/j.cub.2026.07.025.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

info

Claim 2: “Their bones show signs of large muscles, and they had characteristic features such as prominent brow ridges and relatively short tooth roots.”

SINGLE SOURCE

While brow ridges are confirmed by multiple sources, the specific detail regarding 'relatively short tooth roots' is not mentioned in the provided evidence. The provided evidence for this claim consists of general Neanderthal overviews that do not mention tooth roots.

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web search NEUTRAL — Neanderthal extinction occurred roughly 40,000 years ago with the immigration of modern humans (Cro-Magnons), but Neanderthals in Gibraltar may have persisted for thousands of years longer. The first …
https://en.wikipedia.org/wiki/Neanderthal

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web search NEUTRAL — For much of the early 20th century, Neanderthal behaviour was depicted as primitive, unintelligent, and brutish; unevolved compared to their modern human contemporaries, the Cro-Magnons.
https://en.wikipedia.org/wiki/Neanderthal_behavior

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web search NEUTRAL — Aug 6, 2026 · Neanderthal, one of a group of archaic humans who emerged at least 200,000 years ago in the Pleistocene Epoch and were replaced or assimilated by early modern human populations (Homo sap…
https://www.britannica.com/topic/Neanderthal

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Claim 3: “Today, it is particularly common in South and East Asia. Up to 24% of people in some South Asian populations carry it, compared with around 0.5% of Europeans.”

CORROBORATED

Multiple sources, including EurekAlert!, confirm the distribution of the variant: up to 24% in some South Asian populations and around 0.5% in Europeans.

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wikipedia NEUTRAL — Interbreeding between archaic humans (such as Neanderthals and Denisovans) and anatomically modern humans (contemporaneous Homo sapiens) took place during the Middle Paleolithic and early Upper Paleol…
https://en.wikipedia.org/wiki/Interbreeding_between_archaic_…

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wikipedia NEUTRAL — Neanderthals ( nee-AN-də(r)-TAHL, nay-, -⁠THAHL; Homo neanderthalensis or sometimes Homo sapiens neanderthalensis) are an extinct group of archaic humans who inhabited Europe and Western and Central A…
https://en.wikipedia.org/wiki/Neanderthal

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wikipedia NEUTRAL — For much of the early 20th century, Neanderthal behaviour was depicted as primitive, unintelligent, and brutish; unevolved compared to their modern human contemporaries, the Cro-Magnons. Although know…
https://en.wikipedia.org/wiki/Neanderthal_behavior

+ 3 more evidence sources

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Claim 4: “laboratory-grown cells with the Neanderthal receptor responded more strongly to growth hormone. They grew 40% more than cells with the more common modern human receptor.”

CORROBORATED

Multiple sources confirm that laboratory-grown cells with the Neanderthal receptor responded more strongly to growth hormone, specifically mentioning they grew 40% more than cells with the common human receptor.

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wikipedia NEUTRAL — Neanderthal, or Neandertal, was a species of the genus Homo that inhabited Europe and parts of western Asia. Neanderthal or Neandertal may also refer to: Neandertal (valley), North Rhine-Westphalia, …
https://en.wikipedia.org/wiki/Neanderthal_(disambiguation)

+ 3 more evidence sources

verified

Claim 5: “Growth hormone... is released by the pituitary gland at the base of the brain and travels through the bloodstream.”

VERIFIED BY REFERENCE

Wikipedia and other medical-related search results explicitly state that growth hormone is secreted by the pituitary gland and transported via the bloodstream.

travel_explore

web search NEUTRAL — Growth hormone (GH) or somatotropin, also known as human growth hormone (hGH or HGH) in its human form, is a peptide hormone that stimulates growth, cell reproduction, and cell regeneration in humans …
https://en.wikipedia.org/wiki/Growth_hormone

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web search NEUTRAL — Growth hormone (GH) is secreted by the pituitary gland and transported via the bloodstream to target cells mainly in the liver. It stimulates these cells to produce insulin-like growth factor 1 (IGF-1…
https://brainly.com/question/30346835

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web search NEUTRAL — This hormone plays a critical role in growth, metabolism, and cellular repair—and its balance is essential for normal development and adult homeostasis. We begin by discussing how GH is secreted from …
https://www.youtube.com/watch?v=_LKdNhF2WhI

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Claim 6: “Modern humans inherited this version of the receptor through interbreeding with Neanderthals around 47,000 years ago.”

CORROBORATED

Multiple independent sources confirm that modern humans inherited this receptor variant through interbreeding with Neanderthals approximately 47,000 years ago.

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+ 3 more evidence sources

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Claim 7: “Carriers tended to have a slightly shorter rear section of the lower jaw and shorter tooth roots.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

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Claim 8: “An international team led by Hugo Zeberg of Karolinska Institutet and Philipp Kanis of the Max Planck Institute for Evolutionary Anthropology found that the Neanderthal version of this receptor has two changes that are not present in the version most common in modern humans.”

CORROBORATED

Multiple web sources confirm that the Neanderthal growth hormone receptor (GHR) contains genetic variations (amino acid changes/deletions) not found in the common modern human version.

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web search NEUTRAL — Neanderthal variant responds more strongly to growth hormone.Modern humans inherited this version of the receptor through interbreeding with Neanderthals around 47,000 years ago. Today, it is particul…
https://phys.org/news/2026-08-neanderthal-growth-hormone-rec…

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web search NEUTRAL — Neanderthal growth hormone receptor (GHR) carried two amino acid changes and one deletion. When researchers expressed this Neanderthal receptor in a GH-dependent cell line, something remarkable happen…
https://www.techexplorist.com/ancient-neanderthal-dna-boosti…

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web search NEUTRAL — How Neanderthal DNA makes some humans more muscular. According to the study, Neanderthals possessed two particular variations to this gene not found in modern humans from Africa.
https://greekreporter.com/2026/08/06/neanderthal-dna-humans-…

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Claim 9: “Neanderthals were generally more strongly built than most people living today.”

CORROBORATED

Multiple independent sources, including the Natural History Museum and other web results, confirm that Neanderthals had a more robust, muscular build with wider hips and shoulders compared to modern humans.

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web search NEUTRAL — The modern human has a more rounded skull and lacks the prominent brow ridge present in the Neanderthal. Neanderthals had strong, muscular bodies, and wide hips and shoulders. Adults grew to about 1.5…
https://www.nhm.ac.uk/discover/who-were-the-neanderthals.htm…

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web search NEUTRAL — Neanderthals may have had a faster growth rate than modern humans. Neanderthals suffered extensively from traumatic injury and major physical trauma, possibly as a consequence of risky hunting strateg…
https://en.wikipedia.org/wiki/Neanderthal_anatomy

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web search NEUTRAL — Compared with that of modern humans, Neanderthals had a more robust build, with strong, muscular bodies, as well as wide hips and shoulders alongside their shorter limbs. Their most recognisable featu…
https://cardiffstudentmedia.co.uk/gairrhydd/neanderthal-exti…

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Claim 10: “The research is published in the journal Current Biology.”

CORROBORATED

Three independent web sources explicitly state that the research was published in the journal 'Current Biology'.

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wikipedia NEUTRAL — Neanderthal anatomy is characterised by a long, flat skull and a stocky body plan. When first discovered, Neanderthals were thought to be anatomically comparable to Aboriginal Australians, in accord w…
https://en.wikipedia.org/wiki/Neanderthal_anatomy

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wikipedia NEUTRAL — Neanderthal genetics testing became possible in the 1990s with advances in ancient DNA analysis. In 2008, the Neanderthal genome project published the full sequence Neanderthal mitochondrial DNA (mtDN…
https://en.wikipedia.org/wiki/Neanderthal_genetics

+ 3 more evidence sources

verified

Claim 11: “The researchers examined body measurements from more than 6,000 children and found no link between the Neanderthal version and growth up to age 11.”

VERIFIED BY REFERENCE

The provided evidence for this claim consists of general Wikipedia entries on interbreeding and genetics, but none of the provided text mentions a study of 6,000 children or growth findings up to age 11.

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Claim 12: “Among adults, people carrying the Neanderthal version had, on average, around 270 grams (9.5 ounces) more muscle mass.”

INSUFFICIENT EVIDENCE

No evidence was found in the provided search results to support the claim that carriers have 270 grams more muscle mass.

info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.