Ink is generally not considered a poisonous substance. Under normal use, ink poisoning is unlikely. Irritation is a bigger possibility than poisoning is. Ingestion of ink is the most common method of ink poisoning.

When toxins enter the body, they are metabolized by the liver or kidneys. After long-term exposure to toxins or short-term exposure to high amounts of toxins, these organs can sustain damage, allowing toxins to build up in the blood and cause severe symptoms.

Rat poison contains a variety of ingredients that work together to kill rodents; however, these substances are also lethal to humans if ingested. The amount of time it takes for symptoms to appear depends upon the amount of rat poison ingested and the number of days it is ingested.

Delicate, luxuriant ferns add a tropical look to your home. To a young child, though, ferns may look tempting to touch or taste. Unfortunately, some species are toxic or can cause dermatitis on contact. Choosing only non-toxic fern species will help keep the children in your house safe.

Sun poisoning or polymorphous light eruption is a type of rash that results from the skin being exposed to too much sunlight, explains MayoClinic.com. Sun poisoning generally starts off as a really bad sunburn.

Contaminated foods, including raw oysters, cause illness in approximately 48 million Americans every year, according to a 2011 report by the Centers for Disease Control and Prevention. Several organisms can cause food poisoning from raw oysters, including norovirus and Vibrio bacteria.

Selenium is a mineral that's essential to the body in trace amounts, mainly for synthesizing enzymes, but it can be toxic in large amounts.

Hormonal changes during pregnancy alter the workings of the immune system, and this may increase your risk for certain food-borne illnesses, or food poisoning. In most cases, you and your baby will recover well, as long as you stay hydrated.

Bananas are one of the best sources of dietary potassium. A large banana provides 487 mg of this mineral, according to the U.S. Department of Agriculture National Nutrient Database.

Potassium chloride, a salt substitute, simulates sodium chloride or salt to add flavor to food. As with any chemical ingested in significant quantities, use of potassium chloride in large amounts creates medical risks, but potassium chloride is not classified as a poison.

A protein drink can replace a meal to help you eat healthier or lose weight. Although ready-to-drink shakes are convenient, they often contain added sugar or a sugar substitute such as aspartame. Many protein drinks also contain soy protein.

Aluminum cookware is a long-standing kitchen staple due to its low cost and ability to effectively conduct heat.