Uploaded August 2026 | Updated September 2026, 3 days ago
Robert Sikes put the viral sardine fast to a controlled test: five days of eating approximately 18 cans of sardines per day while maintaining roughly 3,000 calories. In this interview, Judy Cho and Robert examine what happened to his weight, blood glucose, ketones, energy, inflammation, hunger, and overall performance—and why his experience differed from the dramatic weight-loss results commonly shared across the keto and carnivore communities.
They also review Robert’s bloodwork before, immediately after, and several weeks after the sardine challenge, including arsenic, mercury, lead, cholesterol, thyroid markers, and SHBG. The conversation explores whether sardine fasting produces unique metabolic benefits, what may actually drive the rapid changes people report, and how extreme short-term diets can affect metabolic health, binge-restriction patterns, and long-term weight-loss success.
0:00 Sardine challenge preview
2:30 Why Robert tested sardine fasting
4:02 Eating 18 sardine cans daily
9:03 Glucose rose while ketones dropped
16:35 Why people do sardine fasts
21:03 Restriction, bingeing, and quick fixes
31:18 Heavy metals after sardine challenge
39:40 The appeal of extreme fasting
43:03 Should people fear mercury in sardines?
_____
EPISODE RESOURCES
Keto Savage Website: ketosavage.com
Keto Savage Youtube: youtube.com/@Ketosavage
Ketogenic Bodybuilding: ketogenicbodybuilding.com
Savage Perspective Podcast: podcasts.apple.com/us/podcast/savage-perspective-podcast/id1169900822
Keto Brick: ketobrick.com
_____
WEEKLY NEWSLETTER
📫 Tips and Weekly Updates: nutritionwithjudy.com/newsletter
JUDY CHO RESOURCES
⛑️Work with Us: empowerfunctionalhealth.com/services
🎙️ Podcast: nutritionwithjudy.buzzsprout.com
📘 Carnivore Cure Book & Elimination Diet: amzn.to/3R4VAXn
📘 Inflammation Fix Book: inflammationfix.co
📚 Articles: nutritionwithjudy.com/articles
🎁 Free Resources: nutritionwithjudy.com/resources
📗 Complete Carnivore Diet for Beginners: amzn.to/3D5lyo5
_____
*DISCLAIMER: This content is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. It should not replace professional medical advice.
#robertsikes #sardinefast #sardines #carnivorediet #ketodiet #ketosis #weightloss #fatloss #metabolichealth #bloodsugar #ketones #heavymetals #mercury #arsenic #cholesterol #thyroidhealth #SHBG #calorierestriction #intermittentfasting #extremefasting #keto #lowcarb #nutritionwithjudy #ketosavage #weightlossjourney
Robert Sikes put the viral sardine fast to a controlled test: five days of eating approximately 18 cans of sardines per day while maintaining roughly 3,000 calories. In this interview, Judy Cho and Robert examine what happened to his weight, blood glucose, ketones, energy, inflammation, hunger, and overall performance—and why his experience differed from the dramatic weight-loss results commonly shared across the keto and carnivore communities.
They also review Robert’s bloodwork before, immediately after, and several weeks after the sardine challenge, including arsenic, mercury, lead, cholesterol, thyroid markers, and SHBG. The conversation explores whether sardine fasting produces unique metabolic benefits, what may actually drive the rapid changes people report, and how extreme short-term diets can affect metabolic health, binge-restriction patterns, and long-term weight-loss success.
0:00 Sardine challenge preview
2:30 Why Robert tested sardine fasting
4:02 Eating 18 sardine cans daily
9:03 Glucose rose while ketones dropped
16:35 Why people do sardine fasts
21:03 Restriction, bingeing, and quick fixes
31:18 Heavy metals after sardine challenge
39:40 The appeal of extreme fasting
43:03 Should people fear mercury in sardines?
_____
EPISODE RESOURCES
Keto Savage Website: ketosavage.com
Keto Savage Youtube: youtube.com/@Ketosavage
Ketogenic Bodybuilding: ketogenicbodybuilding.com
Savage Perspective Podcast: podcasts.apple.com/us/podcast/savage-perspective-podcast/id1169900822
Keto Brick: ketobrick.com
_____
WEEKLY NEWSLETTER
📫 Tips and Weekly Updates: nutritionwithjudy.com/newsletter
JUDY CHO RESOURCES
⛑️Work with Us: empowerfunctionalhealth.com/services
🎙️ Podcast: nutritionwithjudy.buzzsprout.com
📘 Carnivore Cure Book & Elimination Diet: amzn.to/3R4VAXn
📘 Inflammation Fix Book: inflammationfix.co
📚 Articles: nutritionwithjudy.com/articles
🎁 Free Resources: nutritionwithjudy.com/resources
📗 Complete Carnivore Diet for Beginners: amzn.to/3D5lyo5
_____
*DISCLAIMER: This content is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. It should not replace professional medical advice.
#robertsikes #sardinefast #sardines #carnivorediet #ketodiet #ketosis #weightloss #fatloss #metabolichealth #bloodsugar #ketones #heavymetals #mercury #arsenic #cholesterol #thyroidhealth #SHBG #calorierestriction #intermittentfasting #extremefasting #keto #lowcarb #nutritionwithjudy #ketosavage #weightlossjourney
