There are several reasons you may feel colder due to dieting and weight loss.
During Weight Loss, you experience a natural decrease in metabolism due to the reduced amount of calories you’re consuming. It’s like putting less fuel in the furnace – all those calories you used to eat were added fuel that increased body temperature! Your metabolism will increase when you’re on “Lifetime Maintenance” and consuming more calories.
Some people experience the opposite: they feel warmer during certain times of the ‘Lean for Life’ program because their metabolism actually increases for a period of time because of the foods they’re eating (protein) and the regularity of food intake (three meals, three snacks). People who did not eat full, regular meals prior to the program may have lowered their metabolism with that type of eating.
When you lose weight, you have less “insulation” (body fat) now. People who are overweight tend to feel the cold less than lean people. (People often notice feeling “too hot” when they gain weight.) Overweight people are often the ones turning on the air conditioning when the lean people are turning on the heater!
Weight loss and dieting can cause a change in hormone levels. Because a small amount of estrogen is produced in fatty tissue, some individuals may experience hormonal changes when they lose weight. This is normal. The hormonal changes can affect your body temperature.
Also, people who have high blood pressure due to being overweight tend to feel warmer than they would with a normal blood pressure. When their blood pressure lowers as a result of their change in eating habits and weight loss they may feel colder.
Physical activity increases the metabolism and gets your “internal furnace” burning. You’ll probably find you’re less cold when you increase your daily physical activity level. Give it a try – it will benefit your weight and your mental well-being and your general health whether or not it makes a significant difference in your body temperature!
Your body will adapt once your weight stabilizes after achieving your goal and you’ll probably feel less cold then than you do now. You won’t have as much fat, however, so you’ll experience temperature differently than you did previously. Keep in mind that your experience when you’re a healthy, normal weight will be the “normal” one!