Uploaded December 2025 | Updated September 2026, 1 week ago
This video is a full walkthrough and explanation of the Antioxidant Index feature on Samsung Galaxy Watch 8 Classic and Samsung Health.
I show how to measure it, and yes, the information exists inside the app.
No, the app does not explain it in a way most people will actually process.
So I did.
What this video covers:
• What the Antioxidant Index is and what Samsung is actually measuring
• What oxidative stress is and how free radicals are formed in the body
• Lifestyle factors that increase oxidative stress including smoking, alcohol, overeating, stress, and pollution
• How antioxidants work in the body to neutralize free radicals
• What carotenoids are and why they matter more than generic antioxidants
• Why carotenoids give fruits and vegetables their red, yellow, and orange color
• How carotenoids are absorbed through diet and stored in the skin
• How the Samsung Galaxy Watch measures carotenoids using an optical sensor
• Where and how to place your thumb for accurate measurement
• Why the bottom of the thumb is used instead of other areas
• How blood flow, pressure, and timing affect the reading
• Why taking multiple measurements in a short time can change results
• Why stress, smoking, and drinking can lower the score
• Why fruit and vegetable intake raises the score over time
• The Antioxidant Index scale from 0 to 100
• What Adequate, Low, and Very Low actually mean in real terms
• The WHO recommendation of at least 400 grams of fruits and vegetables per day
• How the index correlates with long term dietary habits, not short term changes
• Why supplements can artificially raise the score
• The risks of high dose antioxidant supplements, including beta carotene
• Why supplements are not recommended as a shortcut
• How long it realistically takes for the index to improve
• How to improve the Antioxidant Index through real food
• Which foods are rich in carotenoids
• Why BMI and smoking are linked to oxidative stress
• Why the Antioxidant Index is a guide and not a diagnosis
• The limitations of the feature and how to use it responsibly
This is not a quick watch. It is not meant to be.
It is for people who want clarity, not shortcuts.
This video is a full walkthrough and explanation of the Antioxidant Index feature on Samsung Galaxy Watch 8 Classic and Samsung Health.
I show how to measure it, and yes, the information exists inside the app.
No, the app does not explain it in a way most people will actually process.
So I did.
What this video covers:
• What the Antioxidant Index is and what Samsung is actually measuring
• What oxidative stress is and how free radicals are formed in the body
• Lifestyle factors that increase oxidative stress including smoking, alcohol, overeating, stress, and pollution
• How antioxidants work in the body to neutralize free radicals
• What carotenoids are and why they matter more than generic antioxidants
• Why carotenoids give fruits and vegetables their red, yellow, and orange color
• How carotenoids are absorbed through diet and stored in the skin
• How the Samsung Galaxy Watch measures carotenoids using an optical sensor
• Where and how to place your thumb for accurate measurement
• Why the bottom of the thumb is used instead of other areas
• How blood flow, pressure, and timing affect the reading
• Why taking multiple measurements in a short time can change results
• Why stress, smoking, and drinking can lower the score
• Why fruit and vegetable intake raises the score over time
• The Antioxidant Index scale from 0 to 100
• What Adequate, Low, and Very Low actually mean in real terms
• The WHO recommendation of at least 400 grams of fruits and vegetables per day
• How the index correlates with long term dietary habits, not short term changes
• Why supplements can artificially raise the score
• The risks of high dose antioxidant supplements, including beta carotene
• Why supplements are not recommended as a shortcut
• How long it realistically takes for the index to improve
• How to improve the Antioxidant Index through real food
• Which foods are rich in carotenoids
• Why BMI and smoking are linked to oxidative stress
• Why the Antioxidant Index is a guide and not a diagnosis
• The limitations of the feature and how to use it responsibly
This is not a quick watch. It is not meant to be.
It is for people who want clarity, not shortcuts.
