glutathione and nad+ Moon Laboratory NMN + L-Glutathione Supplement – Support, Mitochondrial Energy & Antioxidant Defense with CoQ10, NAC, PQQ & Alpha Lipoic Acid – 120 Capsules. Refill Pack : Health & Household The thioredoxin and glutathione redox

Note that the clinically studied, approved route for Selank is intranasal

Studies have shown that it remains effective and works systemically this way (1, 19)

298,299 As the tumor-infiltrating Tregs require lactate uptake to sustain their immunosuppressive function, Treg-specific deletion of MCT1 demonstrates that while lactate blockage is not necessary for the functioning of peripheral Treg cells, it is essential within TME and leads to an impaired tumor growth and enhanced sensitivity to immunotherapy

Dietary factors : If you're vegetarian or vegan, you're not going to get good sources of B12 from meat, so that's a really important one