Probiotics
For bipolar/unipolar depression [2], ADHD [3], anxiety [2], cognition [2], autism [2], weight loss [1], dyslipidemia, long COVID [1].
Non-controlled
Citicoline
For mood disorders with meth/cocaine abuse [1], age-related cognitive decline [1], and post-stroke depression [2]
Vitamin D3
Mainly works when levels low: depression, ADHD, autism, sleep quality, negative symptoms of schizophrenia.
SAMe
For depression, improves liver health, osteoarthritis, but l-methylfolate has a similar mechanism and better evidence.
L-methylfolate
[Deplin] Medium effect in depression augmentation [1], may help bipolar depression as well.
Creatine
Augments SSRIs in women only [3]. Improves memory, especially in older adults [2]. Long-COVID [3].