Question: What can be described as a substance to provide nutritional support for an organism, and was one of the specialties of the Marnie Rose Agency?

Context paragraphs:
Marnie Rose Agency: Marnie Rose Agency was founded in August 2001 and represents photographers and stylists in the commercial photography industry.  The agency was created by Marnie Rose, formerly of Martha Stewart Living Omnimedia, to work with artists whose specialties include: Still Life, Tabletop, Food, Lifestyle, and Interior Photography as well as Prop, Food, Wardrobe, and Off-Figure Styling.

Food: Food is any substance consumed to provide nutritional support for an organism.  It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals.  The substance is ingested by an organism and assimilated by the organism's cells to provide energy, maintain life, or stimulate growth.

Drug: A drug is any substance (other than food that provides nutritional support) that, when inhaled, injected, smoked, consumed, absorbed via a patch on the skin, or dissolved under the tongue causes a physiological change in the body.

Intradialytic parenteral nutrition: Intradialytic parenteral nutrition (IDPN) is a nutritional support therapy (medical nutrition therapy) for people on hemodialysis who have a difficult time maintaining adequate nutrition.  It is administered directly into the bloodstream of patients suffering from chronic kidney disease (CKD) in an effort to decrease the associated morbidity and mortality experienced in patients with renal failure.  IDPN contains protein (amino acids), carbohydrates (dextrose), and fats (lipids) in an attempt to meet a patient's weekly nutritional needs.  Solutions can be individualized for each patient based on weight, needs, medical history and enteral intake.

Juven: Juven is a medical food that is manufactured by Abbott Laboratories and used for providing nutritional support under the care of a doctor in individuals with muscle wasting due to AIDS or cancer, to promote wound healing following surgery or injury, or when otherwise recommended by a medical professional.  It is a powderized nutritional supplement that contains 3 grams of calcium β-hydroxy β-methylbutyrate, 14 grams of L -arginine, and 14 grams of L -glutamine per two daily servings.

The Food Chain: The Food Chain is a London, United Kingdom-based charity who provide nutritional support services for people living with HIV in London.

Vitamin: A vitamin is an organic compound and an essential nutrient that an organism requires in limited amounts.  An organic chemical compound (or related set of compounds) is called a vitamin when the organism cannot synthesize the compound in sufficient quantities, and it must be obtained through the diet; thus, the term "vitamin" is conditional upon the circumstances and the particular organism.  For example, ascorbic acid (one form of vitamin C) is a vitamin for humans, but not for most other animals.  Vitamin D is essential only for people who do not have adequate skin exposure to sunlight, as ultraviolet light promotes synthesis in skin cells.  Supplementation is important for the treatment of certain health problems, but there is little evidence of nutritional benefit when used by otherwise healthy people.

Chromium(III) nicotinate: Chromium(III) nicotinate is an ionic substance used for chromium supplementation in some nutritional products, where it is also referred to as chromium polynicotinate.  It appears in products that are referred to as a medical food used for nutritional support for conditions associated with diabetes mellitus type 2.  The product is also known as "niacin-bound chromium".

Gota de Leche: Gota de Leche (lit.  A Drop of Milk) is a foundation started by Trinidad Rizal (sister of Philippine National Hero, Dr. José Rizal) and Concepción Felix on 1906 that primarily aims to provide nutritional and medical needs of indigent Filipino mothers and their children.  Founded by La Protección de la Infancia Inc., the foundation continues to deliver daily milk rations to Filipino infants

Lists of foods: This is a categorically-organized list of foods.  Food is any substance consumed to provide nutritional support for the body.  It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals.  The substance is ingested by an organism and assimilated by the organism's cells in an effort to produce energy, maintain life, or stimulate growth.

Supporting paragraphs: Marnie Rose Agency Food
Answer: Food