Skin Hydration: Why It Matters More Than You Think (And How Science Says You Can Fix It)
When your skin feels tight, looks dull, or starts flaking like a croissant, it’s not just dryness. It could be a sign your skin is dehydrated. And here’s the thing: even oily skin can be dehydrated. Surprised?
Hydration is one of the most overlooked keys to skin that looks healthy, radiant, and youthful. But in a world full of serums, toners, and TikTok routines, it’s easy to miss the basics.
Let’s take a closer look at what skin hydration really means, why it’s essential, how to know if you’re lacking it, and what you can do, inside and out, to bring that glow back.
What Is Skin Hydration?
Hydration simply means your skin has enough water. It's that moisture content in your skin cells that keeps everything plump, smooth, and glowing. Think of it like a grape vs. a raisin, one is full and juicy, the other? Not so much.
When your skin is well-hydrated, it:
• Feels soft and bouncy
• Heal faster and stay calmer
• Looks smoother and brighter
• Show fewer signs of aging, like fine lines and sagging
• Defend itself better against pollutants and irritants
But dehydration breaks all of that down. A 2020 review pointed out that a damaged skin barrier which is often caused by lack of moisture. It then leads to increased water loss and inflammation¹. That’s why hydration should always come before anti-aging creams or fancy treatments.
Signs Your Skin Might Be Dehydrated
You may not need a dermatologist to spot dehydrated skin.
Here are some everyday signs you can look out for:
• Tightness after cleansing
• Flaky patches, especially around the nose, mouth, or eyebrows
• Dull, uneven tone
• Fine lines that suddenly appear more noticeable
• Oilier-than-usual skin (yes, dehydration can trigger more oil production)
• Rough or bumpy texture
• Makeup looking patchy or not sitting well
If you've been nodding along to most of these, your skin might be thirsty, and it’s time to give it a drink.
How to Hydrate Your Skin
Most of us already know the basics of caring for our skin:
- Gentle Face Wash
- Hydrating Toners or Essences
- Hyaluronic acid
- Ampoule, Serums and Moisturizers
The list gets longer with skincare products. However, did you know that probiotics can hydrate your skin too? No, not by applying probiotics to your skin but taking probiotics orally to hydrate skin from the inside out. Let’s dive into that.
Can Probiotics Really Hydrate Your Skin from the Inside? (Science Says Yes)
This is where things get interesting. A growing number of clinical studies show that certain probiotic strains, the good bacteria, don’t just benefit your gut. They can also improve skin hydration, elasticity, and reduce signs of aging.
One star player? Lactobacillus plantarum HY7714.
In a double-blind, placebo-controlled clinical trial (the gold standard of studies), women aged 41–59 with dry, aging skin took HY7714 probiotic daily for 12 weeks². The results? Impressive!
• Skin Hydration: Hydration levels in the face and hands increased significantly²
• Water Loss: Transepidermal water loss decreased significantly²
• Wrinkle Depth: Significant reduction in finelines²
• Skin Gloss: Higher skin gloss due to increase hydration ²
• Skin Elasticity: Improved by over 21%²
• Ceramide: Production increased helps to maintain the skin's structure and retain moisture³
• Anti-inflammatory Effects: Mitigate damage caused by UV radiation (photoaging) and inflammation.⁴
This means HY7714 not only helps hydrate your skin, it helps your skin hold onto that hydration over time. It’s one of the few probiotic strains with clinical evidence on skin aging and is now found in skin-focused supplements.
What About BB-12? Another Probiotic Powerhouse
While HY7714 targets hydration and aging, another well-known strain, Bifidobacterium lactis BB-12, has been shown to help improve skin inflammation and support the skin’s immune barrier.
One study on infants with eczema found that formulas containing BB-12 or Lactobacillus GG significantly reduced skin inflammation, itchiness, and overall eczema severity, even after just two months⁵.
The Bottom Line: Hydrated Skin Is Healthy Skin
Dry and aging skin isn’t just uncomfortable, it’s a sign your skin’s protective barrier is compromised.
Besides having a skincare regime, healthy diet and exercise, include Lactobacillus plantarum HY7714 as part of your daily routine. It’s easier than ever to support your skin’s hydration both topically and from the inside out.
References
1. Ogawa, Y., & Kinoshita, M. (2020). Zinc and skin biology. Archives of Biochemistry and Biophysics, 611, 108–115. https://doi.org/10.1016/j.abb.2020.108115
2. Lee, D. E., Huh, C. S., Ra, J., Choi, I. D., Jeong, J. W., Kim, S. H., ... & Ahn, Y. T. (2015). Clinical evidence of effects of Lactobacillus plantarum HY7714 on skin aging: A randomized, double-blind, placebo-controlled study. Journal of Microbiology and Biotechnology, 25(12), 2160–2168. https://doi.org/10.4014/jmb.1509.09021
3. Ra J, Lee DE, Kim SH, Jeong JW, Ku HK, Kim TY, Choi ID, Jeung W, Sim JH, Ahn YT. Effect of oral administration of Lactobacillus plantarum HY7714 on epidermal hydration in ultraviolet B-irradiated hairless mice. J Microbiol Biotechnol. 2014 Dec 28;24(12):1736-43. doi: 10.4014/jmb.1408.08023. PMID: 25179898.
4. Nam B, Kim SA, Park SD, Kim HJ, Kim JS, Bae CH, Kim JY, Nam W, Lee JL, Sim JH. Regulatory effects of Lactobacillus plantarum HY7714 on skin health by improving intestinal condition. PLoS One. 2020 Apr 10;15(4):e0231268. doi: 10.1371/journal.pone.0231268. PMID: 32275691; PMCID: PMC7147770.
5. Isolauri, E., Arvola, T., Sütas, Y., Moilanen, E., & Salminen, S. (2000). Clinical effects of probiotics in the prevention of atopic eczema in infants. Clinical & Experimental Allergy, 30(11), 1604–1610. https://doi.org/10.1046/j.1365-2222.2000.00943
