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They work through different mechanisms and aren't direct substitutes

Classification, identification, and clinical significance of Haemophilus and Aggregatibacter species with host specificity for humans

The chondroprotective effects of ferulic acid on hydrogen peroxide-stimulated chondrocytes: inhibition of hydrogen peroxide-induced pro-inflammatory cytokines and metalloproteinase gene expression at the mRNA level

Mood Stability: May support serotonin activity

What Category 2 Means Category 2 substances are those the FDA has determined may present significant safety risks or lack sufficient evidence to support safe use in humans