Fatigue, weight changes, poor sleep and low libido are some of the most common reasons adults seek care, and each can have more than one cause. Hormones, thyroid function, blood sugar, nutrient levels, sleep, stress and medications can all play a part, sometimes at the same time.
These articles start with what you are noticing and explain the common medical causes, what an evaluation usually looks at and when a symptom is worth getting checked. They are meant to help you have a more informed conversation with a provider, not to replace one.