What kind of doctor should treat metabolic syndrome?

Most! I believe that all physicians should know how to recognize the possibility and confirm this with tests. However, as a specialist, I find my internal medicine and fp colleagues miss it frequently, even with family history. So an astute fp, im should do it regularly. If not, see a cardiologist or sports physician, or physician nutritionist to both diagnose and treat!
Family doctor. Primary care physicians including family practitioner, internist, or pediatrician.

Related Questions

What kind of doctor should I see to test for metabolic syndrome?

IM, endo. Internal medicine (an internist) or endocrinology (an endocrinologist) are two types of physicians best acquainted with metabolic syndrome.
Specialist or PCP! A good family phycisian will know your build (apple/pear), and also know your family hx. Checking b p is standard, getting your lipids interpreted, and finally your hgba1c, complete the picture. Bmis are ok, but body composition analysis is better. You should leave knowing your ideal weight.

Why doctors consider drugs like (rifampicin & isoniazid) as risk factor of metabolic syndrome?

Metab syndrome. An insulin-sensitizing agent, such as metformin, is often used as hyperglycemia treatment in patients with metabolic syndrome. Literature suggests that metformin may help to reverse the pathophysiologic changes of metabolic syndrome. Cannot find any evidence that Rifampin is a risk factor for metabolic syndrome.

Do I need to go to an endocrinologist to be diagnosed with metabolic syndrome or can my primary care doctor do it?

Primary doc. Pcm should be able to do this. "diagnosing" this is straightforward, but of limited utility since there is no specific treatment for the "syndrome." treatment is targeted at the individual components of the syndrome obesity, hypertension, elevated trig (and low hdl) and elevated fasting blood glucose.
Primary Care. You need to go to your Primary Care Doctor and He/She can evaluate you for Metabolic Syndrome.

Does serequel (anti psychotic) causes metabolic syndrome? Does it lower metabolism? I'm a body builder. I use it to sleep. My doctor knows.

Seroquel (quetiapine) and obesity. Seroquel (quetiapine) is associated with weight gain, as are most of the newer antipsychotics. Seroquel (quetiapine) is not as bad as some others. Your "conditions" list bipolar disorder, and Seroquel (quetiapine) can be very useful for this. If you need to take Seroquel (quetiapine) for your mental health condition, and it works, then follow your doctor's advice and watch your diet / exercise carefully to avoid obesity.