My favorite ones that I most often buy are the blue labeled L-Methylfolate 5-MTHF Plus Methyl B12. They are also called on the lower part of the label, MAXIMUM STRENGTH ACTIVE FORM 15 MG 1,000 mcg of METHYL B12. I buy these because I am most often low on these 2 very important most absorbable types of vitamins. Thank you for having them. I used to get the shots of these 2 vitamins from my doctor, but she retired and I have not been able to get the shots anymore so that is why I try to get these as they are the highest amount and most absorbable that I can find. Thank you for making these! I am grateful.