This diet restricts your intake of carbohydrates like sugars and starches (breads, pasta, etc.) and replaces them with protein and fat. Studies show that low-carb diets reduce your appetite and make you eat fewer calories and lose weight pretty much effortlessly, as long as you manage to keep the carbs down (4).
â Lipids are a large and varied group of biological molecules. Lipids are made mostly from carbon and hydrogen atoms and are generally not soluble in water. â The common categories of lipids are fats, oils, and waxes. â Lipids can be used to store energy. Some lipids are important parts of biological membranes and waterproof coverings. â Steroids synthesized by the body are lipids as well. Many steroids, such as hormones, serve as chemical messengers.
When small organic molecules bind together, they form larger molecules called biological macromolecules. Biological macromolecules fall into four categories: carbohydrates, proteins, lipids and nucleic acids.Your body uses carbohydrates, lipids and proteins for energy. The only biological macromolecule not used for energy is nucleic acid. Nucleic acids hold and transcribe your genetic code.mall organic molecules called amino acids bind together to form the biological macromolecule protein. Protein is the building block of hair, blood cells, muscles and enzymes. If you consume more protein than your body needs, it converts into fat.