Having too much of any neurotransmitter is just as bad as not having enough and can lead to unpleasant side effects like headaches, stomach aches, tremors, or serious complications like serotonin syndrome.40 Serotonin This neurotransmitter is responsible for our mood, sleep, and digestion, and it stabilizes other neurotransmitters
Office of Dietary Supplements
PMID: 20854973 Faivre L, Collod-Beroud G, Loeys BL, Child A, Binquet C, Gautier E, Callewaert B, Arbustini E, Mayer K, Arslan-Kirchner M, Kiotsekoglou A, Comeglio P, Marziliano N, Dietz HC, Halliday D, Beroud C, Bonithon-Kopp C, Claustres M, Muti C, Plauchu H, Robinson PN, Ads LC, Biggin A, Benetts B, Brett M, Holman KJ, De Backer J, Coucke P, Francke U, De Paepe A, Jondeau G, Boileau C
B12 absorption declines with age (4)
It works really well for post-laser resurfacing and also for microneedling