For the most part, an optimal metabolic rate is controlled primarily by the thyroid and the secondary effects from the adrenal glands and the rest of the hormone system, in addition of course to your utilization of oxygen (learn more by reading about Resting Metabolic Rate assessments).
Some signs and symptoms of weight gains due to thyroid imbalances are the following:
Weight gain even with decreased food intake, constipation, cold intolerance, fluid retention (especially around face/neck), poor circulation, ringing in the ears, poor memory, fatigue, hair loss and dry skin and hair. It is well known that body temperature closely reflects an individual’s metabolic energy state. A person with a low consistent first thing in the morning body temperature below 97.8 F (not lower than 96.5 F) has a high probability of a thyroid imbalance that may not be detected on lab work alone. A person with a low fluctuating day to day first thing in the morning body temperature below 97.8 F (not lower than 96.5 F) has a high probability of thyroid, adrenal or other hormonal imbalances that may not be detected on lab work alone.
A person with a low and high fluctuating first thing in the morning body temperature below 97.8 and above 98.2 F (not lower than 96.5 F) has a high probability of not only possible thyroid, adrenal or other hormonal imbalances but also a possible infection and/or autoimmune condition may exist.
If a person has a consistently low first thing in the morning temperature around or below 96.5 F a possible chronic infection or immune system imbalance may exist in addition to a thyroid, adrenal or other hormonal imbalances.
Ideal normal basal body temperature should be between 97.8 to 98.2F with less than a 0.2F fluctuations day to day. If any of these situations exist, seek an appropriate healthcare professional trained in functional medicine that can diagnose and treat all types of thyroid conditions, as any weight loss or long term weight management program will be unsuccessful if a thyroid imbalance is present.
Please Note: Accurate temperature monitoring must be done first thing upon rising while still in bed in the morning with a Lumiscope brand thermometer before any food or drink and tracked daily for at least a week – females please make sure only track your temperature in the day ranges from the first day you started your period to up to day 19 of your cycle, as female hormone fluctuations later in the cycle can alter correct temperature monitoring.
Please Note: Poor sleep the night before and excessive stress can drastically alter your basal body temperature, so be conscious of this while tracking your temperature.