This is the second of a 2 part response to a question about lecithin vs choline. Here's the link to part 1. https://open.spotify.com/episode/2at2pXZQ02Wt9ZmYq3lczz?si=6exmen2-QjWM2fJ6aaItog Please like, comment and share if you find value in this video. Also, please ask any questions you have about supplements. I'll do a video reply as soon as possible. Information References: https://www.sciencedirect.com/science/article/abs/pii/S0197018615300802?via%3Dihub https://pmc.ncbi.nlm.nih.gov/articles/PMC1997116 https://lpi.oregonstate.edu/mic/other-nutrients/choline https://pubmed.ncbi.nlm.nih.gov/14938439/ https://pmc.ncbi.nlm.nih.gov/articles/PMC6835836/ https://ods.od.nih.gov/factsheets/Choline-HealthProfessional/ Image References: https://cordancemedical.com/the-problem/blood-brain-barrier/ https://www.researchgate.net/figure/Molecular-characteristics-of-tight-junction-TJ-protein-complexes-at-the-blood-brain_fig1_363511691 https://www.sciencedirect.com/science/article/abs/pii/S1878818120304357 https://www.ncbi.nlm.nih.gov/books/NBK114308/ https://jissn.biomedcentral.com/articles/10.1186/1550-2783-4-5 https://www.ncbi.nlm.nih.gov/books/NBK594255/ https://pubchem.ncbi.nlm.nih.gov/compound/Choline https://pubchem.ncbi.nlm.nih.gov/compound/L-Tartaric-acid https://www.mdpi.com/2072-6651/8/11/326 https://pmc.ncbi.nlm.nih.gov/articles/PMC8235064/ https://www.examine.com/supplements/alpha-gpc/ https://pmc.ncbi.nlm.nih.gov/articles/PMC10025538/ https://pressbooks.calstate.edu/nutritionandfitness/chapter/6-2-phospholipids-and-sterols/ https://lpi.oregonstate.edu/mic/other-nutrients/choline https://www.researchgate.net/figure/molecular-structure-of-the-phosphatidylethanolamine-eluting-at-462-min_fig2_23771336 https://www.nature.com/articles/srep16787 https://www.researchgate.net/figure/Betaine-metabolism-Metabolic-pathways-involving-betaine-BHMT-betaine-homocysteine_fig11_225081065 https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2022.1109445/full https://ncbi.nlm.nih.gov/books/NBK554408/ https://www.researchgate.net/figure/A-simplified-illustration-of-the-homocysteine-metabolism-pathway-BHMT-betaine_fig1_341362341 https://www.researchgate.net/figure/Fig-2-The-nucleus-basalis-of-Meynert-innervates-the-entire-cerebral-mantle-with_fig1_327756974 https://www.researchgate.net/figure/The-human-cholinergic-system-Cholinergic-nuclei-are-primarily-located-in-numbered-cell_fig1_345346799