If your goal is long-term, sustainable muscle gain, focus on: Strength training three to five times per week High-quality protein sources (grass-fed beef, wild-caught fish, eggs, collagen) and other muscle-building foods Creatine monohydrate (well-researched and widely studied) Adequate calories and micronutrients Stress management and sleep optimization These strategies consistently outperform shortcuts
Unlike oral supplements that must navigate the digestive tractwhere absorption can be limited by various factors including age, digestive health, and certain medicationsB12 injections deliver the full therapeutic dose directly to your cells where it's needed most
For instance, it has been shown that after an experimental psychologic stress, the evoked cortisol response in fatigued breast cancer survivors is much smaller than that in nonfatigued ones, pointing to the involvement of the HPA axis in cancer-related fatigue (286)
Those with plasma B12 levels above 813 pg/mL (600 pmol/L) had a 1.74 to 4.72 times higher risk of being diagnosed with cancer within one year compared to those with levels in the normal range
