Practitioner Corner:
An Introduction to Liposomal Delivery: Clinical Implications for Nutrient Absorption

By: Dr Erika Aranda, VP of Science and Innovation

Oral nutrient absorption can be limited by several physiological barriers, including digestive degradation, poor solubility, and first-pass metabolism. These challenges are especially relevant for compounds such as NAD+, glutathione, curcumin, and certain polyphenols, which may have low oral bioavailability in traditional capsule or powder formats.

Liposomal delivery systems are designed to help address these challenges. Liposomes are microscopic spherical structures composed of phospholipid bilayers, similar to human cell membranes. When nutrients are encapsulated within liposomes, they may be protected from degradation in the gastrointestinal tract and delivered more efficiently across biological membranes.

Phospholipids used in liposomal formulations are typically derived from sources such as sunflower or soy lecithin. These phospholipids self-assemble in aqueous environments to form bilayer vesicles capable of carrying both water-soluble and fat-soluble compounds.

From a clinical perspective, liposomal delivery may offer several potential advantages:

• Improved stability of sensitive compounds during digestion

• Enhanced dispersion of poorly soluble nutrients

• Potentially improved absorption compared to standard oral delivery formats

• Lower required dosing for certain compounds due to improved delivery efficiency

While liposomal delivery does not guarantee increased absorption for every compound, it represents a meaningful formulation strategy for nutrients known to face oral bioavailability challenges.

For practitioners, liposomal delivery may be particularly relevant when working with patients who:

• Have compromised digestion

• Have increased nutrient demands

• Have difficulty swallowing capsules

• Are using nutrients with known absorption limitations

As research continues to evolve, delivery technology is becoming an increasingly important variable in supplement design, alongside ingredient selection and dosing strategy.

For more information, practitioners can contact our team directly for product education support, clinical questions, and patient-use guidance at support@rhonutrition.com.

Introductory References:

1. Allen TM, Cullis PR. Liposomal drug delivery systems. Adv Drug Deliv Rev. 2013;65(1):36-48.

2. Bozzuto G, Molinari A. Liposomes as nanomedical devices. Int J Nanomedicine. 2015;10:975-999.

3. He H, Lu Y, Qi J, et al. Adapting liposomes for oral drug delivery. Acta Pharm Sin B. 2019;9(1):36-48.