glutathione and thyroid function peroxidase 4 inhibition induces ferroptosis mTOR pathway suppression in cancer A Comprehensive Review of Selenium

They should not replace a healthy diet

Selenium may indirectly help to reduce the oxidative stress brought on by the imbalance of adrenal hormones by encouraging hormonal equilibrium (140)

Equilibration: Allow the sealed vial to reach room temperature prior to laboratory handling

It just means the anti-aging claims are ahead of the research

Serious Indicators of Vitamin B-12 Deficiency Severe vitamin B12 deficiency can cause signs and symptoms such as Yellow skin Weak muscles Numb or tingly hands or feet Trouble walking Severe joint pain Increasing shortness of breath Weight loss Irritability Lack of smell and taste sensations Memory loss Paranoia Delusions Deep depression What Does B12 Fatigue Feel Like

10.1016/j.sbi.2018.10.007