Many patients note improvement of their symptoms in the summer months and seasonal flares in colder winter months
In his level chart of 1-28, this rates in at a 36
GSH in Cancer Dual Roles in Carcinogenesis and Drug Resistance (PubMed, 2019) Elevated Tumour GSH as a Driver of Chemotherapy Resistance A comprehensive review published on PubMed examined GSHs dual roles in cancer biology chemopreventive in normal cells through carcinogen detoxification by GST, and pathogenic in tumour cells where elevated GSH levels are associated with tumour progression and increased resistance to chemotherapeutic drugs and radiotherapy
Blood 100:269b, 2002
These findings highlight the critical balance of GSH synthesis and cysteine redox state in regulating oxidative stress, fibroblast behavior, and fibrotic progression
As to the aches and pains, breathlessness etc, this could be due to B12 needing potassium to build RBC, so I would check out low potassium symptoms and eat a banana or maybe two until you have fathomed it out