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This can be achieved by incorporating high-quality dried foods, including micropellets, flakes, and granules, into their feeding regimen

Castrillo-Viguera C, et al

For one, the placebo effect is real and powerful

It still would not be FDA-approved, and formal rulemaking would still need to follow before things are settled

Powders require measuring and mixing, while multi-ingredient blends can make titration more complicated, since increasing or lowering your dose affects several ingredients at once

One small study with amino acid supplements, including L-glutamate (which converts to glutathione in the body), showed improved skin hydration and elasticity