A clinical study explored this effect by evaluating an original therapeutic combination in 29 volunteers with mild to severe acne
Chloramphenicol, though rarely used in modern practice, can antagonize the hematopoietic effects of vitamin B12, potentially reducing the efficacy of methylcobalamin in treating B12 deficiency-related anemia
a glass of milk - 8 mg, 100 g of chicken breast - 4-7 mg, 100 g of beef steak - 56-162 mg, 1100 g of cod - 4-7 mg, half a cup of cream ice cream - 3 mg, 50 g of yellow cheese - 2 mg, 2 eggs - 0.8 mg, 2 slices of wheat bread - 0.2 mg, a glass of cooked chickpeas - 0.1 mg, a glass of spinach - 0.1 mg, 100 g of carrots - 0.4 mg, 100 g of uncooked rice - 0,3 mg
Around two-thirds of drugs that met the 1938 safety requirement failed the 1962 efficacy bar
The honest caveat: most of this evidence is from cell and animal studies