In summary, taking a cysteine supplement is of little use to increase glutathione because our body tightly regulates both the storage and production of cysteine and any excess we consume is broken down into more stable by-products
Does DSIP improve sleep
(2014) 9:e112945
A: Yes, it works well with protein powders, creatine, and pre-workout supplements to support exercise performance and recovery

B12 has many functions in our body, so unfortunately a deficiency will give rise to a wide variety of symptoms, like brain fog, memory problems, cognitive impairment, insomnia, headaches, especially migraine, behavioural changes, learning problems, nominal aphasia, mood swings, irritability, depression, anxiety, hallucinations, delusions, psychosis, peripheral paraesthesia (pins and needles), numbness, neuropathic pains, poor balance, reduced vibration sense or proprioception (joint position sense), tinnitus, ataxia, taste impairment, sometimes myelopathy, fatigue, anaemia (either with larger red blood cells, or with normal size of the red blood cells when there is also iron deficiency), other reduction in blood cells, abdominal complaints, malabsorption, failure to thrive, weight loss, diarrhoea, hyperpigmentation, glossitis, (aphthous) stomatitis, infertility, urinary tract infections, joint and muscle pain, muscle weakness, spasticity, seizures, cardiomyopathy, urinary and/or faecal incontinence, postural hypotension/dizziness, erectile dysfunction, to name a few

Please Read Interactions before undertaking a vitamin C supplement regimen: More information on Vitamin C interactions TIP : When IM injecting, mix 1/2-1cc sterile water into Vitamin C solution to dilute its consistency