Quick summary

Lactoferrin is a multi-functional glycoprotein found primarily in milk and other bodily secretions. It is categorized under Sports, Protein & Performance supplements, but current research is limited and no conclusive clinical trial data are supplied to confirm specific health benefits or a detailed safety profile. There are no official recommended daily intakes or authorized health claims by the European Union for lactoferrin supplementation.

What is it?

Lactoferrin is a naturally occurring protein that belongs to the family of iron-binding glycoproteins. It is present in various secretory fluids such as cow’s milk, human breast milk, saliva, tears, and other mammalian secretions. Lactoferrin is considered an important component of the innate immune system, contributing to host defense mechanisms. It has attracted scientific interest due to its possible nutritional and immune-supporting roles.

How it may work in the body

The biological activities of lactoferrin are thought to be linked mainly to its ability to bind iron and interact with immune cells. The following proposed mechanisms have been suggested:

  • Iron-binding property: Lactoferrin can chelate iron, which may help limit the availability of this mineral to microbes, thus potentially inhibiting their growth.
  • Immune modulation: By interacting with various immune cells, lactoferrin might influence immune responses.

However, it is important to note that the precise mechanisms through which lactoferrin could exert clinically relevant effects in humans remain under investigation. The current data are primarily based on theoretical models or studies in non-human systems, and conclusive human clinical evidence is lacking.

Common supplement forms

The supplied evidence did not include information on common supplement forms of lactoferrin.

Typical dosage and how it is used

There are no specific dosages or official recommendations for lactoferrin supplementation in the available data. No clinical study dosages were supplied, and there is no official recommended daily intake (RDA) or adequate intake (AI) established for lactoferrin. Consumers should be cautious, especially due to the lack of standardized dosing guidelines.

Natural sources

  • Cow’s milk
  • Human breast milk
  • Other mammalian secretions such as saliva and tears

Absorption and bioavailability

No detailed information on the absorption, bioavailability, or factors affecting them for lactoferrin supplements was supplied. The evidence did not address differences between supplement forms, nor did it identify known enhancers or inhibitors of lactoferrin absorption.

Potential benefits: what does the evidence say?

Sports, Protein & Performance

The current evidence provided is insufficient to determine definitive benefits of lactoferrin supplementation for sports performance, protein metabolism, or related outcomes. No specific human clinical trial results or meta-analyses were supplied to support any claims of efficacy in this area. Research status remains pending, and early evidence does not allow firm conclusions about potential benefits.

Side effects and safety

The supplied data do not list common side effects, contraindications, toxicity concerns, or safety warnings related to lactoferrin supplementation. No special considerations for specific populations were noted. Due to limited safety data, users should exercise caution. Individuals who are pregnant, breastfeeding, have underlying medical conditions, or are taking medications should consult a healthcare professional before starting lactoferrin supplements.

Drug and supplement interactions

No information on interactions between lactoferrin and drugs or other supplements was provided in the data.

Who should be careful?

Given the lack of comprehensive safety and interaction data, people who are pregnant or breastfeeding, those with medical conditions, individuals taking medications, and people planning surgery should consult their healthcare provider prior to using lactoferrin supplements.

Pregnancy, breastfeeding and special populations

No specific information on the safety or use of lactoferrin during pregnancy, breastfeeding, or in other special populations (e.g., children, elderly) was supplied. Professional medical advice is recommended in these groups before considering supplementation.

Quality, standardization and what to look for

The evidence did not provide details about quality control, standardization methods, or markers for product selection concerning lactoferrin supplements. Consumers are generally advised to choose products from reputable manufacturers that adhere to good manufacturing practices (GMP) and provide third-party testing for purity and potency.

Frequently asked questions

  • Is lactoferrin naturally found in milk?
    Yes, lactoferrin is a natural protein found in both cow’s milk and human breast milk, among other bodily secretions.
  • Does lactoferrin improve athletic performance?
    Current evidence is insufficient to support any definite claims that lactoferrin enhances sports or protein-related performance outcomes.
  • Is there an official recommended dosage for lactoferrin supplements?
    No, official dietary intake recommendations or standardized dosages are not established for lactoferrin.
  • Are there any known risks or side effects?
    There are no well-documented side effects from lactoferrin supplementation in the supplied data, but safety evidence is limited.

Evidence limitations

  • No human clinical study results or systematic reviews were provided in the supplied data.
  • Lack of detailed safety, dosage, and interaction information limits guidance for consumers.
  • No officially endorsed sources or authorized health claims by regulatory agencies such as the European Union are available for lactoferrin supplementation.

References

Last reviewed

June 2024

Disclaimer: This page provides information based on currently available scientific evidence and does not constitute medical advice. Lactoferrin supplements have not been conclusively proven to treat, cure, or prevent any diseases. Individuals should consult healthcare professionals before beginning any new supplement, especially if pregnant, breastfeeding, having medical conditions, or taking other medications.