I have now finished my Certificate in Health Sciences with the Open University... which enables me to use the above letters after my name...

I chose modules: Human Genetics, Understanding Cancers, Introducing Health Sciences (using Case Studies) and Nutrition.

Introducing Health Sciences was a very good course... beginning in October and ending in June with an exam.  It taught health from 7 different (topical) cases (Water, Pain, Alcohol, COPD, Breast Cancer, Trauma/Recovery, Eyesight).

I thoroughly recommend studying anything you can in the evenings... 

Or try their free-to-the-public to learn something new and see if you might want to study more:

And now I am beginning on the next level... the Diploma of Health Sciences...  beginning with Human Biology...