Liposomale wetenschap

Why don't supplements work for everyone?

Robbin Hertong
Robbin Hertong
CEO & Product SpecialistAugust 2026
Why don't supplements work for everyone?

The supplement paradox: more is not always more

You take your vitamins every morning. You choose well-known brands, spend good money on them, and follow the recommended dosage. Yet you notice little difference. Does that sound familiar?

That is the supplement paradox: the gap between what is on the label and what actually reaches your body. This is rarely due to the supplement itself, but often whether the active ingredient actually reaches its destination.

Four barriers to absorption

1. Stomach acid

An ordinary tablet first ends up in one of the most acidic environments in the body: your stomach, with a pH of 1.5 to 3.5. Some nutrients, such as vitamin C, B vitamins, and reduced glutathione, can be partially broken down there before reaching the small intestine.

2. The intestinal wall

What survives the stomach still has to pass through the intestinal wall. Water-soluble nutrients must cross a lipid membrane to do so. Without the right "packaging," this absorption is slow, incomplete, and highly individual.

3. Your own gut health

Digestive issues, a disturbed gut flora, low stomach acid, or impaired bile function can further reduce absorption. As a result, the same product can have very different effects on different people.

4. The first-pass effect

Nutrients absorbed through the intestinal wall go first to the liver. There, a portion is converted before reaching the general circulation. That "first-pass effect" reduces the amount that ultimately reaches your tissues.

Bioavailability: what it is and why it matters

Bioavailability is the proportion of a nutrient that enters the circulation after ingestion and is available to the body. What matters, therefore, is not just what you take, but how much of it is actually absorbed.

With vitamin C, for instance, absorption decreases as the dose per serving increases; what isn't absorbed can cause loose stools and is excreted. Large, fat-soluble molecules like coenzyme Q10 are relatively poorly absorbed from standard capsules.

The liposomal approach

With liposomal technology, the active ingredient is encapsulated in microscopic spheres of phospholipids: the same material that makes up your own cell membranes. This packaging is designed to protect the substance during digestion.

For our liposomal vitamin C, a clinical study (CT-0007-17, n=24) measured a 1.76× higher bioavailability than that of regular vitamin C.

The PPH standard: dry liposomal technology

PPH uses dry liposomal technology: the liposomes are contained in a stable dry powder matrix. Our products are made in an FSSC 22000-certified production environment in the Netherlands, independently audited by Kiwa Nederland B.V.

  • Protected The active ingredient is encapsulated in liposomes
  • Stable No preservatives, 36-month shelf life
  • Controlled Every production batch is quality-checked before release

Conclusion

Whether a supplement does what you expect often comes down to absorption. Those who understand what bioavailability is can make more informed choices.

View the full PPH range and discover which liposomal formula is right for you.

Because your vitality is not optional — it is essential.

Frequently Asked Questions

Yes. Heat above approximately 40 °C can damage the liposome membrane. Therefore, take liposomal supplements with room-temperature or cold water, and do not mix them into hot drinks or dishes.
Yes. Taking them on an empty stomach or with a light meal is generally well tolerated. Follow the instructions on the packaging.
The most reliable method is a blood test. Your doctor can measure levels such as ferritin and 25-OH-vitamin D. If your levels remain low despite consistent use, discuss with your doctor what the cause might be.
Not necessarily. The price often reflects the technology used and the quality of the ingredients, but not exclusively. Look at the composition, the form of the nutrient, and the scientific backing, rather than just the dosage on the label.
Phospholipids occur naturally in every human cell membrane and in foods such as eggs and sunflower seeds. Liposomes have been used in pharmacy for decades.

Sources

  1. Cara, K.C. et al. (2020). Relative Bioavailability of Vitamin C from Food and Dietary Supplements. Journal of Nutrition. pubmed.ncbi.nlm.nih.gov/32614951/
  2. Briskey, D. et al. (2019). Liposomal encapsulation enhances anti-inflammatory effects of vitamins. Nutrients. pubmed.ncbi.nlm.nih.gov/30791388/
  3. EFSA (2017). Overview of procedures for assessment of dietary supplements. EFSA Journal. efsa.onlinelibrary.wiley.com/
Robbin Hertong

About the author

Robbin Hertong

CEO & Product Specialist, Plant Physiology Health

Robbin Hertong is medeoprichter en CEO van Plant Physiology Health. PPH is gebouwd op de overtuiging dat supplementen eerlijk, begrijpelijk en effectief horen te zijn — wetenschap in gewone taal, voor mensen die het verschil willen voelen.

Disclaimer: De inhoud van dit artikel is uitsluitend informatief en vormt geen medisch advies. PPH-producten zijn voedingssupplementen, geen geneesmiddelen. Raadpleeg een gekwalificeerde zorgverlener voor persoonlijke gezondheidsvragen.