Well, no, if your thyroid sucks, your metabolism won't be fine even with good exercise & a healthy diet. BTDT. But I do agree that improving metabolism is no magic bullet for digestion. ANd yes, cold is another hypothyroid sign. A major one. I recommend a Free T3 test right away in the case of constipation + feeling overcold. Thyroid Mistreatment, Hypothyroidism Scandals, and Thyroid Treatment Problems | Stop The Thyroid Madness. Those are classic symptoms.
5'4" 39yo mother to five sweeties & married to their AMAZING DaddyGrok
Current Weight: 175lb__________________________________Goal: 135lb
Deadlift: 240lb________________________________________Back Squat: 165lb
Bench: 130lb__________________________________________Pre ss: 85lb
***Winning a 20-year war against binge eating disorder***