Can you reverse gray hair? Here’s what the science says

Can you reverse gray hair? Here’s what the science says

866. The market is suddenly full of products claiming to prevent or even reverse gray hair — not by dyeing it, but by actually changing what's happening inside the hair follicle. Some of these serums, supplements, and "anti-gray systems" are backed by genuinely interesting science. Others are getting way ahead of the evidence. Today, Monica breaks down the biology of why hair goes gray, what ingredients show the most promise (and for whom), and which products are banking more on your hope than on clinical proof.


Nutrition Diva is a Quick and Dirty Tips podcast, hosted by Monica Reinagel.

New to Nutrition Diva? Check out our special Spotify playlist for a collection of the best episodes curated by our team and Monica herself!

We've also curated some great playlists on specific episode topics including Staying Strong as We Age, Diabetes, Weight Loss That Lasts and Gut Health! Also, find a playlist of our bone health series, Stronger Bones at Every Age.


Have a question for Nutrition Diva? Email: nutrition@quickanddirtytips.com

Find Monica at wellnessworkshere.com


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The science of hydration and the electrolytes you actually need

The science of hydration and the electrolytes you actually need

Eight glasses a day. An ounce per pound. A pinch of salt in your water. Everyone has a hydration rule, and most of them came from somewhere other than the research. This live episode was recorded in f...

28 Elo 29min

Why is everyone talking about L-Theanine?

Why is everyone talking about L-Theanine?

877. L-theanine, an amino acid found in tea leaves, is having a moment with longevity enthusiasts and menopause influencers alike, promoted to calm anxiety, clear brain fog, improve sleep, and slow ag...

26 Elo 11min

Vitamin K2: Is a supplement a good idea?

Vitamin K2: Is a supplement a good idea?

876. There's no vitamin F or G. After E, we jump straight to K, and that quirk is a hint that this nutrient is more complicated than it looks. Vitamin K isn't one thing. It's a whole family of compoun...

19 Elo 14min

Touching GRAS: What 'generally recognized as safe' really means

Touching GRAS: What 'generally recognized as safe' really means

On a road trip, tackling a summer cleanup, or just catching up on podcasts? QDT has you covered with Summer Saturday encores from your favorite shows. See the full Summer Saturday lineup on Spotify an...

15 Elo 12min

Could eating more calcium lead to kidney stones?

Could eating more calcium lead to kidney stones?

874. If you're prone to kidney stones, you've probably been told to cut back on calcium. If you're worried about your bones, you've been told to get more. So which is it?Turns out it's a false choice....

12 Elo 11min

Do food dyes cause hyperactivity?

Do food dyes cause hyperactivity?

On a road trip, tackling a summer cleanup, or just catching up on podcasts? QDT has you covered with Summer Saturday encores from your favorite shows. See the full Summer Saturday lineup on Spotify an...

8 Elo 13min

Can these foods remove plastics from your body?

Can these foods remove plastics from your body?

874. Some wellness articles promise that certain foods can flush plastics and forever chemicals out of your body. In this episode, Monica tracked down the actual studies behind those claims, looking a...

5 Elo 13min

Can you absorb nutrients through the skin?

Can you absorb nutrients through the skin?

On a road trip, tackling a summer cleanup, or just catching up on podcasts? QDT has you covered with Summer Saturday encores from your favorite shows. See the full Summer Saturday lineup on Spotify an...

1 Elo 9min

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