question about B6, B complex & TTC

posted 3 years ago in TTC
Post # 3
2486 posts
Buzzing bee
  • Wedding: October 2011

Reply isn’t working, sorry

Anyways, I’m taking B6 to combat morning sickness (I’m 10 weeks pregnant). It seems to help with the nausea. However, the vitamin I bought, despite being small and only 100 mg, is five THOUSAND percent of my recommended daily allowance. That is A LOT. I’m cutting it into fourths. My word of advice is to just make sure you don’t take waaay too much since it’s easy to do. Even though you pee out excess B vitamins (they’re water soluble), huge amounts can still have adverse effects. Research the dosage recommended for extending your luteal phase and don’t take more than that is what I would do. Good luck and I hope you get your BFP very soon!

PS I was never sure exactly how long my luteal phase was since I didn’t chart but I THINK it was about 12 days given when I got a positive on an OPK. I got pregnant!

Post # 5
8818 posts
Buzzing Beekeeper

You know my story I think 🙂


100mg B6 and a b-complex vitamin every morning. LP went from 7 days to 9 days in a month, then to 10 days. I swear it was the B6 that helped me 🙂

Post # 6
3119 posts
Sugar bee
  • Wedding: August 2012

I just went out to buy Vitamin B without really doing a ton of research and ended up with just B6…I took 50mg per day at the start of my period, and that cycle my LP lengthened by 3-4 days. Seems like such a huge jump for such a small amount of vitamin, but I hadn’t done anything else differently. That first cycle my O date didn’t change at all, but the second it was about 3 days sooner. I ended up pregnant my second cycle on B6, so I can’t confirm the effect on my LP the second time around….but needless to say I support using it if you need a longer LP. 

ETA The pills I bought (from Target) are 100mg…I cut them in half to make 50mg, because I thought 100 was just too much change. 


Post # 8
3378 posts
Sugar bee
  • Wedding: October 2010

My Endocrinologist wanted to make sure that I wasn’t on more than 100mg of B6 per day as that can really disrupt your cycle.  I’d forgo the additional B6 for now and start with just the complex.  Hope that helps!

Post # 9
10219 posts
Sugar Beekeeper
  • Wedding: December 2012

Hi @mrscandyv:  I did a little GOOGLING on your behalf – How Much B6 a Day – and came up with the following hits:

Which provides info from a lot of different sources… I found 2 out of the list (altho you might want to explore further) that had excellent info on the topic:

The National Institutes of Health (Office of Dietary Supplements) =


The Mayo Clinic (B6 – Dosing) =

The Mayo Clinic page is just the one on Dosing, they have additional info as well.

As always, it is a case of where you can find info on line from good sources, BUT it is YOUR HEALTH, so something that you should discuss directly with YOUR OWN Medical Professional who knows you and can follow you

Hope this helps,


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