are you an angel?

I can't describe how much you an your videos safe my ass in med school. Thank you so much!

Seriously, please keep at it. Biochemistry student from South Africa and you are saving me!

YOU'RE BACK!!😭😭 never been so happy about fatty oxidation 😁

Thank you!!! This is very easy to understand. Such a great help in my upcoming metabolism exam!

Out of words. Te amo, K Lectures

This man deserves all of my tuition dollars!

I've watched half the video and you've already made me understand the notes that I've been reading and haven't been understanding that much. God bless you 😭😭❤❤

the Legend back .Thanks for all your lectures

You're back! We miss you and your awsome lectures😉

this is the best lecture ever👌

back in the game... you saved me last semestterrrrr!

I love your lectures! <3

woww I already watched some of your teaching videos and it was so eaaasy to understand 'clearly', than the explanation of my teacher it self haha. thank you so much for all the awesome video! ^^

Awesome lecture thnx for great help!

Oh how I've missed you. :') Welcome back!!!

thank u sir...its really helpful..thank u very much and welcome back...i was waiting for your new lectures...

thank you.... helped a lot... awesome explanation

Thank you very much.. keep up the good work

If you are interested in how a radical is formed in Vitamin B12, it is formed by the homolysis of a Cobalt-carbon bond in Vitamin B12. The paper I looked at is by Dr. Jun Masuda, "How a protein generates a catalytic radical from coenzyme B12" in Cell Magazine.