To introduce myself to the world of manuka honey, I started out with the 350. Started noticing some good results, one being that it is absolutely delicious. Wanting to further enhance my immune, digestive (which seems to always be an ongoing/ever changing issue) and upcoming allergy season I opted to purchase the 550. Just started to take this and am seeing, so far, good results also. Time will tell as allergies come into full swing although, I am very optimistic. May try the 830 down the road. Thank you for a clean, natural product and the hard work you do to provide it for us.