Hair growth slowing down?

Answered on August 19, 2014
Created March 20, 2011 at 2:19 AM

I'm a 25-year-old female, paleo/primal for about a month. My hair (everywhere on my body, and I have a lot of it!) has always grown at a pretty rapid rate, perhaps abnormally fast. Since changing my eating habits, I've noticed that the growth seems to have reduced/slowed and I don't have to shave or tweeze as frequently.

I don't mind this side effect at all, but it appears contrary to some reports I've seen of increased hair growth on paleo.

Has anyone else experienced this? Do you know what might be causing it?



on April 17, 2011
at 07:14 PM

Dr.K, you just go get a blood test and have you hormones checked? is the expense ($50+) worth it? Would you recommend it to all people? I haven't had a blood test in years (I'm 22) ...



on March 20, 2011
at 10:18 PM

Are you low-carb? That can slow down your metabolism in all kinds of ways.



on March 20, 2011
at 04:28 AM

thyroid issues are big here......outer one third of eye brows are ahuge clinical marker for Hashimoto's thyroiditis in women......Why? leaky gut!



on March 20, 2011
at 02:52 AM

hormones hormesis and diet.......your estrogen to progesterone ration in the last five yrs likely went from 20 to 1 to 6 to 1 as it does for most women 20-25.....I bet your DHEA level is starting to cliff dive. Go get it tested. Inflamamtion shortens telomeres and that also slows hair growth......and yes it can happen in a 25 yr old.


on March 20, 2011
at 02:30 AM

I wish, then I wouldn't have to color my hair so much...

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4 Answers


on April 17, 2011
at 07:49 PM

Hair growth rate is affected by nutritional factors - malnourishment slows it down, supernourishment speeds it up - and vitamin B12 is a major factor - you can get extremely rapid hair growth with high B12 supplementation.

You should probably think about whether you may be malnourished in something. The "essential supplements" on our supplement page are good ones to consider: http://perfecthealthdiet.com/?page_id=1066.

As Dr K suggests, you should also watch for signs of hypothyroidism. TSH should be routinely tested in physicals.

Best, Paul


on March 20, 2011
at 06:17 PM

I've noticed similar growth changes as well, but it's hard to pin them down on the dietary changes specifically. Although, I swear my fingernails grow much faster (increase in protein perhaps?)



on March 20, 2011
at 01:45 PM

That's funny. Mine seems to be growing more, but since I haven't measured it, I can't be sure. What exactly do you eat?


on March 20, 2011
at 04:03 AM

I noticed the same thing with body hair. I have MUCH less and it grows slower. It's awesome! I have light hair but come from a fuzzy family, never liked the degree of peach fuzz I had (used to have a lot of my stomach and upper arms - it's gone now). But I was having significant hormonal issues and symptoms of PCOS before I went primal, which restored my cycle to textbook perfection. I think it's just a matter of my estrogens/androgens being in proper balance now.

Head hair - other than the fact that it was shedding pretty badly when I was VLC (normal now that I eat starch), no difference.

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