ammonia
Water is the most abundant substance in the human body, making up approximately 60% of our total body weight.
The most abundant chemical substance in the human body is water. There are a lot of H2O molecules throughout the human body.
The second most abundant substance in the human body is proteins. Proteins are essential for various functions in the body, including building and repairing tissues, supporting the immune system, and serving as enzymes and hormones.
The most logical answer would be urine, and it is!
Water would be the most abundant substance but if you're asking about elements then oxygen would make up the greatest percentage of body mass.
The most abundant substance in the cytoplasm of cells is water, by a good margin. The most abundant organelle [cellular organ] by mass are ribosomes, which convert DNA into protein.
This substance is water, H2O.
Water is the most abundant substance in the human body, making up approximately 60% of our total body weight.
The solvent is the most plentiful substance
The most abundant chemical substance in the human body is water. There are a lot of H2O molecules throughout the human body.
Food waste is typically the most abundant organic waste, generated from households, restaurants, supermarkets, and food processing facilities. This type of waste can include fruits, vegetables, grains, dairy products, and meats. Recycling and composting are common methods for managing food waste to reduce its environmental impact.
Water is the single most abundant chemical substance in the body, making up about 60% of an adult's total body weight.
The second most abundant substance in the human body is proteins. Proteins are essential for various functions in the body, including building and repairing tissues, supporting the immune system, and serving as enzymes and hormones.
H20
Water itself - H2O.
carbon
The question is flawed. Substance can mean element or molecule. I'll go with molecule since organic simply means carbon atoms are present. Hydrogen dioxide is the most abundant inorganic "substance".