Relevant information:
Dietary fructose linked to liver damage by gut bacteria mechanism: Animal data
I used to think HFCS-55 was close enough to sucrose too, but the theoretical HFCS-55 has only 42 % glucose, i.e. it's almost four parts fructose to three parts glucose. 56/42 = 4/3. What they found in actual samples can be up to about 2:1.
hfcs hplc is sufficient to retrieve the citation at PubMed.
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