Dear Sir,
Are you looking for generalized answer, than the answer for your second query is yes.
For your first query, there are supplements which are natural, but since testesterone is a male reproductive hormone, as an health expert with PhD degree I cannot answer for your personal consumption unless I am able to verify certain biochemical tests.
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Health Tips
The world of supplements is a science, and you do need a expert opinion and guidance, to avoid any health problems like
kidney failure, baldness, acne, growth problems and even sexual dysfunction