When the body is under stress, glutathione levels can drop quickly, which may leave the immune response feeling sluggish
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Based on the review of the evidence, the FDA concluded that allulose provides very few calories 0.4 kcal/g because most of the allulose we consume (around 70%) is absorbed and excreted unchanged in the urine, while the remaining ~30% may be fermented in the gut or excreted in feces
In recent works, the study demonstrated that GCH1/ BH4 pathic enzyme dihydrofolate reductase (DHFR) could inhibit ferroptosis by generating BH4, so decrease in DHFR activity reduces BH4 content to enhance lipid peroxidation and sensitizes cells to ferroptosis (Lu et al., 2024), but the detail process is still unknown (Figure 1)