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Eating sweet foods produces acid in the mouth, which can cause tooth decay. (High acid levels are measured by low pH values)
The shown graph illustrates a continuous acidity in the mouth after a consumption of sugar or honey. The relation between sources shows at various times of rising acid level in the mouth, which tend to cause the tooth decay.
According to the graph, at the moment that sugar or honey is consumed, pH level is generally high for both, at 7 for fruit and cane sugar and also for honey. It is clear that at that time a tooth decay was unlikely to happen. All three trends, then tend to have a steep decrease to 5 minutes. However, pH levels are slightly different, honey is just under 5, while sugars are even more acid, approximately 4.5 for the fruit sugar and 3.5 for the cane sugar. After 5 minutes elapsed after eating, honey has a period of stability up to 10 minutes, while fruit and cane sugar immediately have a sharp rise. An optimal pH level for the tooth decay is 5.5, which is passed by honey in about 13 minutes after a consumption, in 20 minutes after eating fruits and 30 minutes from cane sugar. Generally, all three values are back at the pH level 7 at some time, 25th minute, 35th minute and 40th minute, for honey, fruit sugar and cane sugar, respectively.
