23 Symptoms That Could Indicate Hyperthyroidism

Lisette Marie

15. Brittle Nails and Thinning Hair

Hands of a woman playing with nails in stress. Photo Credit: Envato @cait00sith

If your nails are peeling or breaking more easily—or your hairbrush seems fuller than usual—it could be more than just a change in the weather. Hyperthyroidism affects the body’s ability to absorb nutrients like biotin and iron, which are essential for strong nails and healthy hair. Over time, you may notice hair becoming fine, limp, or thinning around the crown and temples. Brittle nails that crack, split, or form ridges may also emerge. This seemingly superficial change is actually a key outward sign of inner hormonal chaos.

BACK

(15 of 25)

<div class="ads ads-1 collapse-container group-display-adsense unit-2024-desktop-rail-336x600-long zone-slideshow-desktop-rail-bottom">
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6736552601239305"
     crossorigin="anonymous"></script>

<ins class="adsbygoogle"
     style="display:inline-block;width:300px;height:600px"
     data-ad-client="ca-pub-6736552601239305"
     data-ad-slot="7087745678"></ins>
<script>
     (adsbygoogle = window.adsbygoogle || []).push({});
</script>
<script>
  addBlurHandler('sdr-bottom', function (el, zone) {
    if (cf_utm_source === 'bing') {
        uetqApi('outbound_click', {
            'event_category': 'PPC',
            'event_label': 'Adsense',
            'event_value': '1'
        });
        console.log('Fired bing.');
    }
	
	if (cf_utm_source === 'google') {
		gtag('event', 'conversion', {
			'send_to': 'AW-17008664059/yUYKCMCtl7kaEPu7rq4_',
			'value': 0.0,
			'currency': 'USD'
		});
    	console.log('Fired Google Conversion.');
	}
	
    console.log('Fired pixel.');
});
</script>
</div>

OpenAI Playground 2025-05-13 at 10.55.45.png

<div class="ads ads-1 collapse-container group-display-adsense unit-2024-desktop-rail-336x280-sticky zone-slideshow-desktop-rail-sticky">
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6736552601239305"
     crossorigin="anonymous"></script>

<ins class="adsbygoogle"
     style="display:inline-block;width:300px;height:280px"
     data-ad-client="ca-pub-6736552601239305"
     data-ad-slot="9869999824"></ins>
<script>
     (adsbygoogle = window.adsbygoogle || []).push({});
</script>
<script>
  addBlurHandler('sdr-sticky', function (el, zone) {
    if (cf_utm_source === 'bing') {
        uetqApi('outbound_click', {
            'event_category': 'PPC',
            'event_label': 'Adsense',
            'event_value': '1'
        });
        console.log('Fired bing.');
    }
	
	if (cf_utm_source === 'google') {
	  gtag('event', 'conversion', {
		'send_to': 'AW-17008664059/yUYKCMCtl7kaEPu7rq4_',
		'value': 0.0,
		'currency': 'USD'
	  });
	  console.log('Fired Google Conversion.');
  	}

console.log('Fired pixel.');
});
</script>
</div>

15. Brittle Nails and Thinning Hair

MORE FROM HealthPrep