Testosterone works hard in the body, maintaining everything from bone density to muscle mass to sex drive and beyond. A significant drop in testosterone levels can result in a reduced sex drive, increased body fat, decreased motivation, and sleep problems like insomnia. These symptoms can add up to chronic low energy, and mental and physical fatigue.
As the name says, a low-carb diet restricts the type and amount of carbohydrates you eat. Carbohydrates are a type of calorie-providing macronutrient found in many foods and beverages. Many carbohydrates occur naturally in plant-based foods, such as grains.
A paleo diet, or paleolithic diet, is a modern diet designed to emulate the diet of wild animals and plants eaten by humans during the Paleolithic era, or as far as this is possible in relation to foods available today. It's also therefore sometimes called a Stone Age, hunter-gatherer, or caveman diet.