doi: 10.1016/j.yexmp.2021.104617 276 YangXLiJWuYNiBZhangB
Broccoli, cauliflower, cabbage, kale, bok choy, and Brussels sprouts are popular cruciferous vegetables

Many foods that are high in glutathione, sulfur, and other antioxidants have been linked to improved glutathione levels, such as ( 4 ): whey protein powder (high in cysteine) cruciferous vegetables (e.g., broccoli, cabbage, cauliflower, bok choy, Brussels sprouts) allium vegetables (e.g., garlic, onions, shallots) other fruits and vegetables (e.g., asparagus, avocado, cucumber, green beans, mango, papaya, spinach, and tomato) herbs and spices (e.g., curcumin from turmeric) green tea selenium-rich foods (e.g., Brazil nuts, beef, chicken, seafood, dairy products, and whole grains) vitamin C foods (e.g., bell peppers, papaya, mango, oranges, kiwi, Brussels sprouts, cabbage, cauliflower) omega-3s (e.g., fatty fish, omega-3 supplements ) While helpful, it's currently debated whether eating a diet rich in glutathione will significantly improve glutathione levels, since it's not completely absorbed through food
doi: 10.3390/plants12030494 104 HendersonT
The metabolically active forms of B12 - methylcobalamin and adenosylcobalamin - require no further conversion in the body