Oral lactoferrin 350 mg/day added from the day after small-incision cataract surgery,
does it really help with Improved tear-breakup time, Schirmer testing, and dry-eye symptoms at 60 days after surgery?
research showsGrade C. In an open-label trial randomizing 64 cataract patients without pre-existing dry eye and analyzing 58 completers, 60-day tear-breakup time was 13.9 seconds with lactoferrin versus 7.86 seconds with control, and Schirmer testing was 30.9 versus 15.86 mm. The differences were large, but there was no placebo or masking, only completers were analyzed, and the population had postoperative rather than general chronic dry eye.
ads claimSaying that lactoferrin treats all dry eye erases the postoperative population and the open-label no-placebo design.
Useful facts when choosing a product
- The tested oral dose was 350 mg/day.
- Treatment began after small-incision cataract surgery and lasted 60 days.
- No multivitamin or omega-3 combination was tested.
What the research actually shows
Sixty-four small-incision cataract patients were simply randomized 32/32 to routine postoperative care with or without lactoferrin 350 mg/day. Six did not complete follow-up, leaving 28 and 30 analyzed. At day 60, tBUT was 7.86 versus 13.9 seconds, Schirmer was 15.86 versus 30.9 mm, and at least mild OSDI symptoms occurred in 42.8% versus 26.6%.
Why this is classified as C (54)
Large objective differences provide a human efficacy signal, but completer analysis, n=64, 60 days, open-label no-placebo design, and a narrow postoperative population give C with 54 points.
Counterpoint. No participant reported diarrhea, loss of appetite, rash, or constipation during the study.
Rejudgment record. Codex PMC full-text, bibliographic, and scoring cross-check — Accepted large tBUT and Schirmer effect sizes and independent randomization while accounting for completer analysis, n=64, 60 days, open-label no-placebo design, and postoperative population restriction
| Endpoint | S | Surrogate marker - laboratory or imaging measures |
| Replication | R1 | Single confirmatory trial |
| Independence | I2 | Decisive evidence is publicly or non-profit funded |
| Effect size | E+ | Meets the clinically important threshold |
The scoring table and the verdict agree (C).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Improved tear-film tests 60 days after cataract surgery | C | Both tBUT and Schirmer differed substantially. |
| Treatment of chronic dry-eye disease in general | ? | Patients with pre-existing dry eye were excluded. |
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Devendra J·Singh S. 2015 | Single-center nonblinded simple-randomized parallel trial | 60 | No financial or competing interests reported | Tear-breakup time, Schirmer test 1, and OSDI | Day-60 tBUT 13.9 vs 7.86 seconds; Schirmer 30.9 vs 15.86 mm; at least mild OSDI symptoms 26.6% vs 42.8% | Large objective signal in an open-label completer analysis |
Receipt — 1 References
All 1 cited sources were verified for existence at the original page (as of 2026-09-07).
Final verification and publication gate: Codex · Verification cutoff: 2026-09-07 · Corrections: none
Cite this verdict
[Chamgap] Oral Lactoferrin for Dry Eye at 60 Days After Cataract Surgery — Evidence Grade C·54. 1 cited sources checked. Source: https://chamgap.com/en/verdicts/eye/oral-lactoferrin-post-cataract-surgery-dry-eye/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
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