John Speakman
@johnspeakman4.bsky.social
Scientist interested in energy balance - hence obesity and aging. Running labs in China (Shenzhen) and Scotland (Aberdeen). Co_EIC life metabolism. Also likes photography: especially wildlife.
RACMEM 2025 is over and everyone is home safely. Time for some relaxation and photography. White throated kingfisher. zoom in for feather details. Nikon Z9 with 600m f4 lens. 1/1000s f5.6.
October 24, 2025 at 2:46 AM
RACMEM 2025 is over and everyone is home safely. Time for some relaxation and photography. White throated kingfisher. zoom in for feather details. Nikon Z9 with 600m f4 lens. 1/1000s f5.6.
Immature black winged stilt. Shenzhen. October 2025. Nikon z9 600mm f4 1/10000s
October 20, 2025 at 12:28 PM
Immature black winged stilt. Shenzhen. October 2025. Nikon z9 600mm f4 1/10000s
RACMEM 2025
Important notice
Registrations will close on the 30th September (or when venue capacity is reached if sooner). Late registrations will not be accepted. If you wish to attend and didn't yet register this is your last chance.
Please register at www.racmem.com Please retweet.
Important notice
Registrations will close on the 30th September (or when venue capacity is reached if sooner). Late registrations will not be accepted. If you wish to attend and didn't yet register this is your last chance.
Please register at www.racmem.com Please retweet.
Home | RACMEM
Recent Advances and Controversies in the Measurement of Energy Metabolism
www.racmem.com
September 23, 2025 at 8:20 AM
RACMEM 2025
Important notice
Registrations will close on the 30th September (or when venue capacity is reached if sooner). Late registrations will not be accepted. If you wish to attend and didn't yet register this is your last chance.
Please register at www.racmem.com Please retweet.
Important notice
Registrations will close on the 30th September (or when venue capacity is reached if sooner). Late registrations will not be accepted. If you wish to attend and didn't yet register this is your last chance.
Please register at www.racmem.com Please retweet.
Bee fly eye. Zoom in for detail of ommatidia.
Nikon z9 with 105,, f2.8 macro and 250 Raynox. 1/6400 s f10
Nikon z9 with 105,, f2.8 macro and 250 Raynox. 1/6400 s f10
September 2, 2025 at 9:20 PM
Bee fly eye. Zoom in for detail of ommatidia.
Nikon z9 with 105,, f2.8 macro and 250 Raynox. 1/6400 s f10
Nikon z9 with 105,, f2.8 macro and 250 Raynox. 1/6400 s f10
Reposted by John Speakman
After years of work with @juliabelluz.bsky.social, it's hard to believe that our book FOOD INTELLIGENCE will be published this month! @barnesandnoble.com has 25% off pre-orders placed on Sept 3-5.
www.barnesandnoble.com/w/food-intel...
www.barnesandnoble.com/w/food-intel...
September 1, 2025 at 3:23 PM
After years of work with @juliabelluz.bsky.social, it's hard to believe that our book FOOD INTELLIGENCE will be published this month! @barnesandnoble.com has 25% off pre-orders placed on Sept 3-5.
www.barnesandnoble.com/w/food-intel...
www.barnesandnoble.com/w/food-intel...
Bee fly with pollen on its face. Nikon z9 with 105mm f2.8 macro lens and Raynox 250. 1/6400 s f10.
August 31, 2025 at 3:46 PM
Bee fly with pollen on its face. Nikon z9 with 105mm f2.8 macro lens and Raynox 250. 1/6400 s f10.
Two flies on a dead shrew. Nikon Z9 with 105mm f2.8 macro lens with raynox 250 fitted. !/6400 s f4
August 30, 2025 at 2:07 PM
Two flies on a dead shrew. Nikon Z9 with 105mm f2.8 macro lens with raynox 250 fitted. !/6400 s f4
Singer and bassist. Meeting jazz club, Shenzhen. Nikon Z6
August 16, 2025 at 1:56 PM
Singer and bassist. Meeting jazz club, Shenzhen. Nikon Z6
Li River. Guilin to Yongshou. 2006. Taken on film and now digitised.
August 9, 2025 at 7:18 PM
Li River. Guilin to Yongshou. 2006. Taken on film and now digitised.
flying carrion crow against blue sky. Aberdeen, Scotland, UK. August 2025. Nikon Z9 with 200mm f2.8 lens. 1/10000s
August 2, 2025 at 2:39 PM
flying carrion crow against blue sky. Aberdeen, Scotland, UK. August 2025. Nikon Z9 with 200mm f2.8 lens. 1/10000s
RACMEM 2025
Abstract submission for contributed short talks and posters is now open. There will be a bunch of 500 USD prizes for the best talks and posters, by ECRs, post docs and students. Abstract submission form at
racmem.com
Abstract submission for contributed short talks and posters is now open. There will be a bunch of 500 USD prizes for the best talks and posters, by ECRs, post docs and students. Abstract submission form at
racmem.com
Home | RACMEM
Recent Advances and Controversies in the Measurement of Energy Metabolism
racmem.com
July 3, 2025 at 1:08 PM
RACMEM 2025
Abstract submission for contributed short talks and posters is now open. There will be a bunch of 500 USD prizes for the best talks and posters, by ECRs, post docs and students. Abstract submission form at
racmem.com
Abstract submission for contributed short talks and posters is now open. There will be a bunch of 500 USD prizes for the best talks and posters, by ECRs, post docs and students. Abstract submission form at
racmem.com
wood pigeon on silver birch tree. Aberdeen. May 2025.
June 3, 2025 at 7:13 PM
wood pigeon on silver birch tree. Aberdeen. May 2025.
Chinese pond heron in summer plumage. May 2025. Shenzhen. Nikon z6.
May 11, 2025 at 1:29 PM
Chinese pond heron in summer plumage. May 2025. Shenzhen. Nikon z6.
Reposted by John Speakman
Food insecurity drives obesity and adiposity, but how is unclear.
A recent study by @clemmensenc.bsky.social developed a mouse model for this phenomenon lnkd.in/d8pEp2qv
Happy to share a commentary written with @johnspeakman4.bsky.social with our take on that study
doi.org/10.1002/oby....
A recent study by @clemmensenc.bsky.social developed a mouse model for this phenomenon lnkd.in/d8pEp2qv
Happy to share a commentary written with @johnspeakman4.bsky.social with our take on that study
doi.org/10.1002/oby....
Scarce and unpredictable, yet obesogenic: modeling the impact of food insecurity on adiposity in mice
Click on the article title to read more.
doi.org
April 25, 2025 at 10:56 AM
Food insecurity drives obesity and adiposity, but how is unclear.
A recent study by @clemmensenc.bsky.social developed a mouse model for this phenomenon lnkd.in/d8pEp2qv
Happy to share a commentary written with @johnspeakman4.bsky.social with our take on that study
doi.org/10.1002/oby....
A recent study by @clemmensenc.bsky.social developed a mouse model for this phenomenon lnkd.in/d8pEp2qv
Happy to share a commentary written with @johnspeakman4.bsky.social with our take on that study
doi.org/10.1002/oby....
Reposted by John Speakman
Check out this great commentary by @bartolomuccilab.bsky.social and @johnspeakman4.bsky.social on our recent paper, that investigates the role of #foodinsecurity on energy homeostasis and #adiposity in mice 💡
Food insecurity drives obesity and adiposity, but how is unclear.
A recent study by @clemmensenc.bsky.social developed a mouse model for this phenomenon lnkd.in/d8pEp2qv
Happy to share a commentary written with @johnspeakman4.bsky.social with our take on that study
doi.org/10.1002/oby....
A recent study by @clemmensenc.bsky.social developed a mouse model for this phenomenon lnkd.in/d8pEp2qv
Happy to share a commentary written with @johnspeakman4.bsky.social with our take on that study
doi.org/10.1002/oby....
Scarce and unpredictable, yet obesogenic: modeling the impact of food insecurity on adiposity in mice
Click on the article title to read more.
doi.org
April 26, 2025 at 7:03 AM
Check out this great commentary by @bartolomuccilab.bsky.social and @johnspeakman4.bsky.social on our recent paper, that investigates the role of #foodinsecurity on energy homeostasis and #adiposity in mice 💡
Reposted by John Speakman
Issues of diet design in rodent studies discussed here with @kevinh-phd.bsky.social @johnspeakman4.bsky.social
pubmed.ncbi.nlm.nih.gov/37485302/
pubmed.ncbi.nlm.nih.gov/37485302/
Chowing down: diet considerations in rodent models of metabolic disease - PubMed
Diet plays a substantial role in the etiology, progression, and treatment of chronic disease and is best considered as a multifaceted set of modifiable input variables with pleiotropic effects on a va...
pubmed.ncbi.nlm.nih.gov
April 30, 2025 at 7:34 PM
Issues of diet design in rodent studies discussed here with @kevinh-phd.bsky.social @johnspeakman4.bsky.social
pubmed.ncbi.nlm.nih.gov/37485302/
pubmed.ncbi.nlm.nih.gov/37485302/
RACMEM 2025 to be held in Shenzhen 13th to 17th October is now open for registration. Please spread the word.
www.racmem.org
www.racmem.org
Home | RACMEM
Recent Advances and Controversies in the Measurement of Energy Metabolism
www.racmem.org
April 10, 2025 at 2:03 PM
RACMEM 2025 to be held in Shenzhen 13th to 17th October is now open for registration. Please spread the word.
www.racmem.org
www.racmem.org
Looking for new drugs to treat obesity by repurposing old ones. Very happy to have been part of this study looking at the weight loss effects of Halofuginone acting via both FGF21 and GDF15. In Science Advances
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
The clinical antiprotozoal drug halofuginone promotes weight loss by elevating GDF15 and FGF21
Halofuginone curbs weight gain in mice and pigs.
www.science.org
March 27, 2025 at 8:45 AM
Looking for new drugs to treat obesity by repurposing old ones. Very happy to have been part of this study looking at the weight loss effects of Halofuginone acting via both FGF21 and GDF15. In Science Advances
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Coming soon.
Registration for RACMEM 2025 to be held in Shenzhen China will open in early April.
Keep an eye on the site www.racmem.com places limited to 230. please retweet (or whatever the equivalent is on here)
Registration for RACMEM 2025 to be held in Shenzhen China will open in early April.
Keep an eye on the site www.racmem.com places limited to 230. please retweet (or whatever the equivalent is on here)
Home | RACMEM
Recent Advances and Controversies in the Measurement of Energy Metabolism
www.racmem.com
March 10, 2025 at 2:39 PM
Coming soon.
Registration for RACMEM 2025 to be held in Shenzhen China will open in early April.
Keep an eye on the site www.racmem.com places limited to 230. please retweet (or whatever the equivalent is on here)
Registration for RACMEM 2025 to be held in Shenzhen China will open in early April.
Keep an eye on the site www.racmem.com places limited to 230. please retweet (or whatever the equivalent is on here)
Thanks Dan for posting.
New from Professor Speakman and colleagues. The carbohydrate Insulin model and acute studies of hunger in humans @cp-cellmetabolism.bsky.social @johnspeakman4.bsky.social www.cell.com/cell-metabol...
Testing the carbohydrate-insulin model: Short-term metabolic responses to consumption of meals with varying glycemic index in healthy adults
Liu et al. show that meals with different glycemic indices affected glucose and insulin
levels, consistent with the carbohydrate-insulin model (CIM), but this was not linked
to subjective hunger diffe...
www.cell.com
March 6, 2025 at 1:42 PM
Thanks Dan for posting.
Reposted by John Speakman
MAHA nutrition advisor & chiropractor says the 1st nutrition issue he wants addressed is the 'food pyramid', a USDA food guide tool that was sunset in 2011 (it's been MyPlate since).
Glad to see we are finally taking nutrition very seriously.
www.foxnews.com/food-drink/a...
Glad to see we are finally taking nutrition very seriously.
www.foxnews.com/food-drink/a...
American nutrition a top priority for MAHA as the 'Knowledge Doc' weighs in
"The Knowledge Doc" Eric Berg is taking a stand in the fight for better nutrition as RFK Jr. moves to challenge food industry to "Make America Healthy Again."
www.foxnews.com
February 23, 2025 at 9:53 PM
MAHA nutrition advisor & chiropractor says the 1st nutrition issue he wants addressed is the 'food pyramid', a USDA food guide tool that was sunset in 2011 (it's been MyPlate since).
Glad to see we are finally taking nutrition very seriously.
www.foxnews.com/food-drink/a...
Glad to see we are finally taking nutrition very seriously.
www.foxnews.com/food-drink/a...
Yellow-eyed penguin. OPERA Eco reserve. Otago peninsula, near Dunedin, South island, New Zealand.
February 19, 2025 at 4:43 AM
Yellow-eyed penguin. OPERA Eco reserve. Otago peninsula, near Dunedin, South island, New Zealand.
Paradise shelduck in the afternoon sun. New Zealand endemic. Christchurch. Feb 2025. Nikon z6 with 120mm lens. F4 1/3200s
February 9, 2025 at 10:00 PM
Paradise shelduck in the afternoon sun. New Zealand endemic. Christchurch. Feb 2025. Nikon z6 with 120mm lens. F4 1/3200s
University of Canterbury. Christchurch, New Zealand. Feb 2025
February 8, 2025 at 8:21 PM
University of Canterbury. Christchurch, New Zealand. Feb 2025
Gannet coming in to land looking like a ballerina. They are so graceful in the air but so clumsy on the ground. Murawai gannet colony, North Island, New Zealand. February 2025. Nikon z9 with 200mm 1/4000s f14.
February 2, 2025 at 6:38 AM
Gannet coming in to land looking like a ballerina. They are so graceful in the air but so clumsy on the ground. Murawai gannet colony, North Island, New Zealand. February 2025. Nikon z9 with 200mm 1/4000s f14.