The neurotransmitter serotonin is synthesized from the amino acid tryptophan through 5-HTP. In which tryptophan gets converted into 5-HTP via the enzyme tryptophan hydroxylase and 5-HTP gets converted into serotonin via the enzyme L-amino acid decarboxylase.[4] Serotonin is later degraded into 5-hydroxyindoleacetic acid (5-HIAA) by monoamine oxidase.
Cells were pretreated with indicated concentrations of Tβ4 peptide for 2 hours and then incubated with 200 μM H2O2 for 48 hours (A-C). Protein expressions were assessed by Western blot analysis (A). The production of NO (B) and PGE2 (C) were measured by Griess reaction and ELISA, respectively. Data replicated the quantifications of NO and PGE2 with the standard deviation of at least three experiments (n = 4). The bar graph shows the fold increase in protein expression compared with control cells. * Statistically significant differences compared with the control, p<0.05. # Statistically significant difference compared with the H2O2—treated group.
Obviously nobody is suggesting coming off your medication, and for many cases of depression and anxiety, a course of SSRIs and/or CBT can be life-saving. For me, during a period of bad anxiety, when I was torn between the idea of going back on antidepressants or not, I began searching for some sort of alternative aid online and soon came across a video of Jim Carrey. Carrey has struggled with depression for the majority of his adult life; he's a classic case of the sad clown. "I take... supplements," he tells Larry King in the clip I found. "Vitamins?" asks King. Not quite, but not far off either. A natural substance called 5-HTP. "It's a wonderful thing," Carrey smiles. "It's amazing." His description of how 5-HTP worked made it sound like a super-drug, a cure-all. All it would take for me would be an anonymous trip to Holland and Barrett and 15 quid. Like every other young person, I knew it as a quick fix for MDMA comedowns, but never considered buying it as a medication replacement. Obviously for severe depression and anxiety, a serious course of SSRIs or cognitive behavioural therapy would be more appropriate. But at this point, I was ready for something to ease the transition.

Conclusions:  Melanotan not a treatment or cure for anything.  Nor should it be considered a preventative treatment for skin cancer.  Despite this tanning peptide being known to protect the skin through the natural tanning process, it is not in and itself a guaranteed full proof UV shield.  However, it is a great way for those who don't tan easily to get sun-kissed all year long with minimal exposure to the sun.
Injection is the most effective way to administrate the peptide and results are seen the fastest and best. The nasal spray method is effective up to 30 – 40% because the nasal passages have poor absorption rate, you have to apply the nasal spray at least two to three times more than the injection. The injectable product of the Melanotan is very superior as compared to the nasal version. The nasal versions generally take four to five weeks for displaying the results appose to 10 days with the injection.
For those deficient in tryptophan, supplemental tryptophan and 5-HTP could be somewhat effective,[17] although a meta-analysis found barely statistically significant results (Odds Ratio of 1.3-13.2) from a statistically subpar collection of studies, and based on the inclusion criteria it set it had to expand its analysis to both 5-HTP and Tryptophan to get two studies to assess.[23]
“Shortly after taking the supplement, my vision changes. Colours appear more vivid, I feel lightheaded and generally at ease. My mind calms down and the racing thoughts stop. Today is the 3rd day and I’ve noticed the intensity has gone up and it almost feels like I’m tripping on something. The sky looked absolutely amazing today, colours are so intense but I feel a kind of ungrounded and odd, but still pretty mellow with no anxious thoughts or anything like that which is good.”
Jump up ^ Low TL, Hu SK, Goldstein AL (February 1981). "Complete amino acid sequence of bovine thymosin beta 4: a thymic hormone that induces terminal deoxynucleotidyl transferase activity in thymocyte populations". Proceedings of the National Academy of Sciences of the United States of America. 78 (2): 1162–6. Bibcode:1981PNAS...78.1162L. doi:10.1073/pnas.78.2.1162. PMC 319967. PMID 6940133.
Three groups of mice were individually placed in cages with aggressive mice and experienced social defeat, a stressful experience for them. One group was missing its oxytocin receptors, essentially the plug by which the hormone accesses brain cells. The lack of receptors means oxytocin couldn't enter the mice's brain cells. The second group had an increased number of receptors so their brain cells were flooded with the hormone. The third control group had a normal number of receptors.
Thymosin beta 4 (Tβ4) is a highly conserved, naturally occurring, water-soluble regenerative peptide that is found in all tissues and in all cell types, except red blood cells (Goldstein, Hannappel, Sosne, & Kleinman, 2012; Goldstein & Kleinman, 2015). It is also found in the blood and in other body fluids, including tears, saliva, cerebrospinal fluid, and wound fluids (Badamchian et al., 2007; Huang, Wang, Barnes, & Elmets, 2006; Mohring, Kellmann, Jurgens, & Schrader, 2005). Both platelets and leukocytes release Tβ4 into the wound fluid such that the final concentration is 13 μg/mL (Fromm, Gunne, Bergman, et al., 1996; Hannappel & van Kampen, 1987).
However, as I’ve said elsewhere, depression is kind of like a check engine light on car, it’s a quiet ambiguous sign that something is not working somewhere in your neurobiology. There is literally dozens (perhaps hundreds) of different ways to attempt to treat depression. Amongst the vast number of options for treating depression, there is a couple of low hanging fruits; things you would want to start with before moving onto more radical options, like…
In humans, oxytocin is thought to be released during hugging, touching, and orgasm in both genders. In the brain, oxytocin is involved in social recognition and bonding, and may be involved in the formation of trust between people and generosity.123 Oxytocin first became of interest to researchers when they discovered that breastfeeding women are calmer when exercising and experiencing stress than moms who were bottle-feeding. It is just one part of the important, complex neurochemical system in our bodies that helps us adapt to emotional situations.
Thymosin beta 4 (Tβ4) is a highly conserved, naturally occurring, water-soluble regenerative peptide that is found in all tissues and in all cell types, except red blood cells (Goldstein, Hannappel, Sosne, & Kleinman, 2012; Goldstein & Kleinman, 2015). It is also found in the blood and in other body fluids, including tears, saliva, cerebrospinal fluid, and wound fluids (Badamchian et al., 2007; Huang, Wang, Barnes, & Elmets, 2006; Mohring, Kellmann, Jurgens, & Schrader, 2005). Both platelets and leukocytes release Tβ4 into the wound fluid such that the final concentration is 13 μg/mL (Fromm, Gunne, Bergman, et al., 1996; Hannappel & van Kampen, 1987).
A handful of large-scale clinical trials are now getting under way to test oxytocin and oxytocin-based therapies for autism spectrum disorder, and to work out who could benefit. Linmarie Sikich, a child psychiatrist at the University of North Carolina is heading the largest of these trials. Sikich plans to recruit 300 people with autism spectrum disorder, ranging in age from 3 to 17, and give them 6 months of either oxytocin or a placebo, followed by 6 months in which everyone will receive oxytocin.
Virtually all vertebrates have an oxytocin-like nonapeptide hormone that supports reproductive functions and a vasopressin-like nonapeptide hormone involved in water regulation. The two genes are usually located close to each other (less than 15,000 bases apart) on the same chromosome, and are transcribed in opposite directions (however, in fugu,[44] the homologs are further apart and transcribed in the same direction).
In the male mammal, the small peptide hormone oxytocin is produced in similar quantities within the hypothalamo-pituitary magnocellular system as in the female, yet for the male little is known about the physiology associated with this hormone. The present review summarizes what is known about the function of oxytocin in the male mammal and tries to take account of both central and systemic effects, and those linked with a local production of oxytocin within the male reproductive organs. In several species a pulse of systemic oxytocin, presumably of hypothalamic origin, appears to be associated with ejaculation. The systemic hormone could act peripherally stimulating smooth muscle cells of the male reproductive tract, but could also reflect central effects in the brain modulating sexual behaviour. In addition to systemic oxytocin, the peptide is also made locally within the testis, and possibly also the epididymis and prostate. In the former tissue it appears to have an autocrine/paracrine role modulating steroid metabolism, but may in addition be involved in contractility of the seminiferous tubules. However, the latter function may involve the mediacy of Sertoli cells which under some circumstances can also exhibit the components of a local oxytocin system. In the prostate of the rat and the dog oxytocin is linked again to steroid metabolism and may also act as a growth regulator. Finally, oxytocin in seminal fluid is discussed and its possible role in respect to the fate of the semen following ejaculation.
Oxytocin (Oxt; /ˌɒksɪˈtoʊsɪn/) is a peptide hormone and neuropeptide. Oxytocin is normally produced by the paraventricular nucleus of the hypothalamus and released by the posterior pituitary.[3] It plays a role in social bonding, sexual reproduction, and during and after childbirth.[4] Oxytocin is released into the bloodstream as a hormone in response to stretching of the cervix and uterus during labor and with stimulation of the nipples from breastfeeding.[5] This helps with birth, bonding with the baby, and milk production.[5][6] Oxytocin was discovered by Henry Dale in 1906.[7] Its molecular structure was determined in 1952.[8] Oxytocin is also used as a medication to facilitate childbirth.[9][10][11]
Oxytocin is not only correlated with the preferences of individuals to associate with members of their own group, but it is also evident during conflicts between members of different groups. During conflict, individuals receiving nasally administered oxytocin demonstrate more frequent defense-motivated responses toward in-group members than out-group members. Further, oxytocin was correlated with participant desire to protect vulnerable in-group members, despite that individual's attachment to the conflict.[64] Similarly, it has been demonstrated that when oxytocin is administered, individuals alter their subjective preferences in order to align with in-group ideals over out-group ideals.[65] These studies demonstrate that oxytocin is associated with intergroup dynamics. Further, oxytocin influences the responses of individuals in a particular group to those of another group. The in-group bias is evident in smaller groups; however, it can also be extended to groups as large as one's entire country leading toward a tendency of strong national zeal. A study done in the Netherlands showed that oxytocin increased the in-group favoritism of their nation while decreasing acceptance of members of other ethnicities and foreigners.[66] People also show more affection for their country's flag while remaining indifferent to other cultural objects when exposed to oxytocin.[67] It has thus been hypothesized that this hormone may be a factor in xenophobic tendencies secondary to this effect. Thus, oxytocin appears to affect individuals at an international level where the in-group becomes a specific "home" country and the out-group grows to include all other countries.
Though it may be unlikely to form part of any official psychiatric programme in the UK, Phil Cowen, Professor of Psychopharmacology at Oxford University, admitted that there are various groups for whom it could be helpful. "About half of people with severe depression never see a doctor anyway, so it's reasonable to think it's fine for them to treat themselves with something like a supplement. Perhaps if you had mild symptoms, a smaller dose would be helpful. I'd also prefer to prescribe things like exercise or computer-based CBT if it's that stage, though. But depression and anxiety is very different between people, that's important to keep in mind. No treatment is the same for anyone."
This anti-social effect of a social hormone brings some nuance to the story of oxytocin. In one study, researchers found that Dutch students given a snort of the hormone became more positive about fictional Dutch characters, but were more negative about characters with Arab or German names. The finding suggests that oxytocin's social bonding effects are targeted at whomever a person perceives as part of their in-group, the researchers reported in January 2011 in the journal PNAS.
Obesity. Early research suggests that taking 5-HTP might help reduce appetite, caloric intake, and weight in obese people. Other research suggests that using a specific mouth spray containing 5-HTP and other extracts (5-HTP-Nat Exts, Medestea Biotech S.p.a., Torino, Italy) for 4 weeks increases weight loss by about 41% in overweight postmenopausal women.