Can Prebiotic Fibre Improve Your Skin? New Research Says Yes

 When most people think about skincare, they picture creams, serums, and facials. But science is showing that healthy, radiant skin may start in the gut. A 2025 clinical study has found that a simple plant-based prebiotic fibre — partially hydrolysed guar gum (PHGG) — can significantly improve skin hydration, elasticity, and barrier function.

The Study: PHGG and Skin Health

Published in the Journal of Clinical Biochemistry and Nutrition (Kapoor et al., 2025), this randomized, double-blind, placebo-controlled trial followed 70 healthy men and women over 12 weeks. Participants took either 5g of PHGG daily or a placebo.

The results were striking:

  • Improved hydration – skin retained more moisture, even during the dry winter season.

  • Reduced trans-epidermal water loss (TEWL) – meaning the skin barrier was stronger and better at holding moisture.

  • Better elasticity – skin became more supple and resilient.

  • High satisfaction – participants reported visible and felt improvements, with no side effects noted.

In short, daily PHGG supported softer, smoother, healthier-looking skin from the inside out.

Why Gut Health Matters for Skin

The gut and skin are closely linked via the gut-skin axis. When the gut microbiome is balanced, inflammation decreases and the skin’s natural defences improve. Prebiotic fibres like PHGG feed beneficial bacteria, which then produce short-chain fatty acids (SCFAs) that play a role in hydration and barrier function.

This means that nourishing your gut may be just as important as your skincare routine when it comes to achieving a healthy glow.

Where to Find PHGG

Wonder Foods PHGG is a premium, taste-free prebiotic fibre that dissolves easily in water, smoothies, or food. It’s gentle on digestion, suitable for daily use, and now supported by research for its skin benefits as well as gut health.

The Role of Lifestyle

It’s not just about what you eat. Regular exercise improves circulation, reduces stress, and supports detoxification — all of which can improve skin health. Working with exercise physiology professionals ensures your training program supports both inner and outer vitality.

Takeaway

If you’re looking for a natural way to improve skin hydration, elasticity, and barrier function, PHGG may be the missing link between your gut and your glow. It’s safe, simple, and now backed by clinical evidence.

This article is brought to you by Propel Health, the Australian company behind Wonder Foods and Propel Fit.

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