Need Product Review Style Guest Posts

I need my product reviewed on a health/fitness niche site.

it depends on the website that you want to submit your blog post. but it has some general styles like:

1. Create a connection with the reader just like you’re writing for your own blog, speaking in first or second person will definitely help you create that bond.
2. use data and numbers, as long as you keep it simple and explanatory.
3. Include pictures, screenshots
4. Tell a story: Keep your posts interesting and relevant.
5. Be clear and be concise.

but as I said keep in mind that who is it for and always check out other guest posts in that website.

hope it helps.