fda warning letters glp-1 compounders september 2025 issued 25 to telehealth companies for false and misleading claims about compounded products. Unlike FDA-approved drugs, these products have not been proven to be safe, effective, or of FDA Issues 30 Warning Letters

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Conclusion Though they may sound similar, you need to be aware of some important differences between L-carnitine and L-carnosine

doi: 10.1016/j.clinme.2024.100030 [PubMed] 39407841 Scafetta T, Kovacs O, Milani GP, Bronz G, Lava SAG, Betti C, Vanoni F, Bianchetti MG, Far PB, Camozzi P

Data availability Not applicable Abbreviations 6-OHDA: 6-hydroxydopamine -HB: Alpha-hydroxybutyric acid -syn: Alpha-synuclein BBB: Blood-brain barrier BCSFB: Blood-cerebrospinal fluid barrier BMDM: Bone marrow-derived macrophage CCL2: C-C motif chemokine ligand 2 (MCP-1) CCL3: C-C motif chemokine ligand 3 (MIP-1) CCL5: C-C motif chemokine ligand 5 (RANTES) CD: Cluster of differentiation CNS: Central nervous system CRP: C-reactive protein CSF: Cerebrospinal fluid CXCL10: C-X-C motif chemokine ligand 10 DA: Dopamine DCA: Deoxycholic acid DHA: Docosahexaenoic acid EV: Extracellular vesicle GBA1: Glucosylceramidase Beta 1 GCase: Glucocerebrosidase enzyme activity GDCA: Glycodeoxycholic acid GPR40: G protein-coupled receptor 40 HA: Hippuric acid HLA-DR: Human leukocyte antigen - DR isotype IFN-: Interferon gamma IL-1: Interleukin-1 beta IL-2: Interleukin-2 IL-4: Interleukin-4 IL-6: Interleukin-6 IL-8: Interleukin-8 IL-10: Interleukin-10 IL-13: Interleukin-13 IP-10: Interferon-gamma-induced protein 10 L-DOPA: Levodopa LBs: Lewy body/bodies LDL: Low-density lipoprotein LNs: Lewy neuritis LRRK2: Leucine-rich repeat kinase 2 LPS: Lipopolysaccharide MHC: Major histocompatibility complex miRNA: MicroRNA MMP: Mitochondrial membrane potential MP: Microparticle MV: Microvesicle MPTP: 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine MSC: Mesenchymal stem cell NHC: Neurologically healthy control NFAT: Nuclear factor of activated T cells NF-B: Nuclear factor kappa-light-chain-enhancer of activated B cells NMDA: N-methyl-D-aspartate NLRP3: NLR Family Pyrin Domain Containing 3 PBMCs: Peripheral blood mononuclear cells PD: Parkinson disease PET: Positron emission tomography PUFA: Polyunsaturated fatty acid RBD: REM sleep behaviour disorder REM: Rapid eye movement RNA: Ribonucleic acid ROS: Reactive oxygen species SN: Substantia nigra SNCA: Synuclein alpha gene SNpc: Substantia nigra pars compacta TCA: Tricarboxylic acid TG: Triglyceride TGF-1: Transforming growth factor beta-1 Th: T helper TLR: Toll-like receptor TNF-: Tumour necrosis factor alpha TRAF6: TNF- receptor-associated factor 6 TSPO: Translocator protein UA: Uric acid UPDRS: Unified Parkinsons Disease Rating Scale References Armstrong MJ, Okun MS