Yes, you can travel with your L-Glutathione kit
Several randomized trials show K2 supplementation reducing arterial stiffness and preserving bone mineral density in postmenopausal women [15]
Red Blood Cell Formation Like folate, erythroblasts require vitamin B12 for proliferation during their differentiation

each 10% reduction in homocysteine is associated with 1.45-2.55 reduction in pulse pressure mmHg in patients undergoing hemodialysis (14)(27)(31) Increased urinary excretion of homocysteine in its sulfonated form (36) Omega-3 fatty acids 200-6,000 mg (~98-2,000 mg EPA/490-1,000 mg DHA) per day, for 1-12 months in patients with hyperhomocysteinemia or elevated homocysteine within normal ranges (8)(11)(13)(17)(18)(19)(25)(30)(42)(43) Reduced homocysteine by 1.18-1.58 mol/L on average using wide dose ranges, as shown in meta-analyses (8)(18) Reduced homocysteine by ~2.5-4.0 mol/L in patients with type II diabetes, patients on hemodialysis, or healthy adults using mid-range doses of 2,000-3,600 mg per day for 1-3 months and up to one year (11)(17)(25)(30)(42)(43) Reduced homocysteine by ~1.6 mol/L over 12 months in patients younger than 65 years, previously suffering from myocardial infarction (13) Adjunct therapy with folic acid, vitamin B6, and vitamin B12 improved efficacy (8)(17) Adjunct aerobic exercise and cognitive stimulation may be required for benefit in some populations, including older adults with mild cognitive impairment (19)

Take a look at the supplements he relies on
Limbs have a higher concentration of nerves and blood vessels, which increases the risk of hitting a nerve or injecting into a blood vessel