If you don't have insurance, or if they won't cover something you would like tested there is pirvatemdlabs They are popular with the fitness crowd for their female hormone panel which is $60 and can be used by men.

Make sure you know what healthy levels actually are. Pro-tip: you are not the average of 400 million people.

Some examples where the range accepted by AMA guidelines are wrong:

1. Guidelines push total cholesterol under 200. Cholesterol under 200 is predictive of greater CVD in older adults.

2. Guidelines push low LDL. HDL:Triglyceride ratio is much more predictive of CVD than LDL levels.

3. Blood pressure has very high variability, making a high BP diagnosis problematic. BP lowering drugs often do more harm than good.

4. The accepted range for iron is from 15nm/dL all the way up to 300nm/dL IIRC, but there are indications the low end of the spectrum is significantly better.

5. Guidelines on salt do not take into account potassium consumption, which seem to have an effect on whether salt interventions are harmful or helpful to CVD risk.

These are not intended to be me imparting wisdom, they are intended as examples to demonstrate why you need to look into the details of longevity yourself. Almost no one bothers to collate evidence from studies correctly, including often the people conducting the studies -_-.

Unfortunately I am unaware of any sources with reliable epistemic hygiene.

In my country (but I think elsewhere too), if you donate blood they test it for lots of health issues for free.