In a nutshell:
The role of tin in the human body is still being researched.
There is very little information on the value of tin in the human body. It is also debatable whether this element is vital for the body. Tin is part of gastrin which is a hormone that regulates the gastric acid production in the stomach. It is assumed that tin is involved in the body's own decomposition and oxidation processes (redox system) as well as the metabolism of proteins. Tin is possibly also a part of the gastrin hormone which regulates the formation of hydrochloric acid in the stomach.
Tin has only been proven to be a vital element in animal experiments.
Requirement, deficiency, oversupply:
A daily recommended dietary intake of tin has not yet been provided.
Deficiency symptoms are not yet known.
Tin in Foods:
Fresh foods hardly have any tin. The amount of tin in food is dependant on the soil the food was planted on and the vegetation.
Prescription for Nutritional Healing, Fifth Edition: A Practical A-to-Z Reference to Drug-Free Remedies Using Vitamins, Minerals, Herbs & Food Supplements, Phyllis A. Balch CNC
The Complete Book of Food Counts, 9th Edition: The Book That Counts It All