Hello,
I have completed my Bachelors and post graduate certificate in Human sciences, nutrition and public health. I do not have any sample articles with me at present as all the articles/ reports I have written are for my university assignments which I always get good grades (Distinctions and High Distinctions).
I can write on any health topics required. If you need articles on healthy eating, exercise or even articles on the adverse effects of certain foods or the explaining about a disease and chronic illness.
For example I can write the article you need on asthma and depending on how many words you require, I can accordingly adjust the article. All my work is fully referenced and written using information from good journals and references.
I will need to know what exactly you want tests and what sort of tests you require for the vitamins?