- Yokohama-shi Top Page
- Health, medical care, welfare
- Health, medical care
- Institute of Public Health
- Food hygiene information
- Frequently Complaint Casebook
- Color
- Complaint casebook: Discoloration of water soaked sweet potatoes
The text is from here.
Complaint casebook: Discoloration of water soaked sweet potatoes
Last updated on March 3, 2025.
1.Overview
When the sweet potatoes were soaked in water, the water turned reddish purple.
2.Test Results
Color: When the whole sweet potatoes were soaked in 300ml of water, red-purple pigment eluted and anthocyan pigment was detected.
3.Conclusion
It is thought that the pigment of the skin of the sweet potato (anthocyan pigment) has eluted. There is no harm to your body.
Published on March 8, 2007
Inquiries to this page
RIKEN, Medical Care Bureau Institute of Hygiene
Phone: 045-370-9451
Phone: 045-370-9451
Fax: 045-370-8462
E-Mail address [email protected]
Page ID: 672-378-567
