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Supplement Guide Promising evidence
L-Glutamine
The same white powder scooped into smoothies by gym-goers is also an FDA-approved prescription that helps people with sickle cell disease avoid hospital...
L-Glutamine

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Supplement Guide Weak evidence
Glucosamine
In 1876, a young German surgeon dissolved discarded crab shells in acid and crystallized a strange sugar he called "glycosamin." Decades later, the...
N-acetylglucosamine

Comparison
Comparison Promising evidence
Probiotics (live microbes) vs Prebiotics (selective substrates)
For most common needs: after antibiotics or for IBS/mood support, choose Probiotics; for constipation and day-to-day fiber-driven microbiome support, choose...
Inulin

