1. Check the label, but don't take it for granted
Check around the brand name or logo in addition to the ingredient list to check for "additives" or "added flavors." Pure honey should only have one ingredient: honey. However, even if no other ingredients are listed, the manufacturer may not be telling the truth.


2. Taste the honey if a sample is offered
Tasting is not an accurate way to test for additives, but if taste is your main concern, it could be all you need to make a decision.. Note that a "weird" taste does not necessarily mean the honey isn't pure. There are many varieties of honey made from the nectar of different flowers, saps, or even the secretions of sap-eating insects. Each of these produces different flavors, and even the honey of one beehive can vary from year to year as they collect nectar from different sources.


N.B
Most sellers will not allow you to open a jar before purchasing. Ask whether you can taste a sample, but do not insist if one is not available.Understand that these tests are not 100% accurate.

3. Add a spoonful of liquid honey to warm water
Add a spoonful of honey to a glass of warm water, stirring slowly or not at all. If the honey has been mixed with certain kinds of sugar syrup, it will dissolve in the water. Most pure honeys, and unfortunately some adulterated honeys as well, will stick together and sink as a solid lump, or remain stuck as a lump on the spoon


4. Set fire to a cotton pad or candle wick dipped in honey
This test only checks for added water in the honey, which may prevent the honey from burning. Dip a cotton pad or the cotton wick of a candle into a bit of the honey, and shake off the excess. Attempt to light the cotton pad or wick. If it burns easily, then it probably has no added water, but may or may not have other substances added. If it refuses to burn or makes a cracking sound instead, water may have been added.


5. Drop honey on blotting paper or a paper towel
If honey has been diluted with water, it may be absorbed or leave a wet mark on an absorbent material such as blotting paper. Pure honey should not be absorbed, but unfortunately neither will honey diluted with most sugar syrups.


6. Don't let ants make your decision for you
Ants are interested in anything sweet and nutritious. Ants will eat honey, colored corn syrup, and anything in between.
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Source: WIKIHOW

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