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Harms of Eating Clams on Your Health

by
author image Brian Willett
Brian Willett began writing in 2005. He has been published in the "Buffalo News," the "Daytona Times" and "Natural Muscle Magazine." Willett also writes for Bloginity.com and Bodybuilding.com. He is an American Council on Exercise-certified personal trainer and earned a Bachelor of Arts in journalism from the University of North Carolina.
Harms of Eating Clams on Your Health
Clams offer nutritional benefits, but eating too many may be harmful. Photo Credit Ablestock.com/AbleStock.com/Getty Images

Clams can be a beneficial food to include in your diet, as they are moderately low in calories and rich in protein. However, eating too many clams can have detrimental effects, as some of the nutrients clams provide can be harmful in large doses. If you feel you are experiencing harm from eating clams or any other food, seek professional medical attention immediately.

Clam Nutritional Profile

Clams, like other types of seafood, are relatively low in calories, with 126 per 3-oz. serving. Each 3-oz. serving of cooked clams provides 21.7 g of protein, with 1.7 g of fat and 4.4 g of carbohydrates. Clams are rich in a variety of nutrients, including potassium, iron, selenium and vitamin B-12. Note that cooking clams in oil or butter will alter the nutritional values.

Selenium Overdose

One of the risks of eating too many clams is taking in too much selenium. Your body needs selenium for the proper function of your immune system and thyroid, but the daily suggested intake of this nutrient is 55 mg, less than 1 mg more than 3 oz. of clams provides. If you eat multiple servings of clams, you could ingest too much selenium, which may cause upset stomach, fatigue, nerve damage and irritability. The Institute of Medicine recommends never exceeding 400 mg of selenium in a day.

Vitamin B-12 Overdose

Vitamin B-12 is an essential vitamin that supports the manufacture of amino acids and an enzyme involved in producing hemoglobin, which carries oxygenated blood throughout your body. Unfortunately, too much vitamin B-12 may result in rashes and itching, diarrhea or a blood vessel disease known as peripheral vascular thrombosis. Each 3-oz. serving of clams contains 84 mcg, which is more than 32 times the daily suggested intake of 2.6 mcg.

Iron Overdose

Iron is a vital nutrient your body uses to make cellular energy and to transport oxygen. However, regularly consuming too much iron may cause liver damage, diabetes, diarrhea and upset stomach. The University of Maryland Medical Center also suggests that too much iron may increase your risk of Alzheimer's disease, certain cancers and heart disease, but notes that "the evidence isn't clear." The recommended daily intake of iron is 8 mg for men and 18 g for women, and a 3-oz. serving of clams contains 24 mg.

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