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Barbiec1953 (Vienna, Virginia) on 10/05/2011
5 out of 5 stars

An imbalanced ratio of arginine: lysine will cause Herpes Simplex/Cold Sore/Fever Blister breakouts. Try to eat your arginine foods as little as possible... And stop them altogether as soon as you feel the tingling.
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Replied By beverly (usa) on 10/29/2023

I may have solved my own mystery.............I rarely get fever blisters but have changed my diet to Keto due to my husband being diagnosed with Parkinsons. One of the things I started doing was getting high fat yogurt, cream, buttermilk and keifer from a nearby dairy. The past month I have been constantly plagued with fever blisters at the corners of my mouth and nostrils.

Certain Foods

Consuming arginine-rich foods – such as beans, meat, chocolate and dairy – can trigger or worsen a cold sore. This is because arginine is required for the virus to replicate. Acidic foods and beverages can also trigger a cold sore outbreak. This includes citrus fruits, tomatoes, orange juice and even soda.

Source

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