A patient who has been taking Sertraline (Zoloft) for 12 weeks reports increased appetite and increased concentration, but continues to complain of having little interest in socializing. Which complimentary therapy would be best for this patient?

A. Folate: L-methylfolate is an effective adjunct for patients with a partial response to SSRIs like sertraline. It supports the synthesis of serotonin, norepinephrine, and dopamine, helping alleviate residual symptoms such as anhedonia and low social interest. B. St. John's Wort: St. John’s Wort is an herbal antidepressant that can interact with many medications, including SSRIs, increasing the risk of serotonin syndrome. Its use alongside sertraline is not recommended without careful monitoring. C. SAMe: S-adenosylmethionine (SAMe) may improve depressive symptoms by modulating neurotransmitter synthesis, but evidence for improving social interest or motivation specifically is limited. Potential interactions with SSRIs warrant caution. D. Omega-3: While Omega-3 fatty acids are beneficial for general brain health and may have a mild antidepressant effect, they are less specifically targeted toward augmenting the "partial response" of an SSRI compared to the direct enzymatic role of folate in neurotransmitter production.