antioxidant · for eye strain
Astaxanthin
Eases fatigue in the tiny muscle your eye uses to focus.
Say that in clinical terms
Reduces ciliary muscle fatigue, improves accommodative function, protects against oxidative stress in ocular tissues.
How strong is the research?
2 papers read, 2 supporting.
Tested as: AstaReal® astaxanthin, 4 mg/day
Who was studied: Studied in Japanese office workers with screen-related eye strain — a close match if that is you.
How much to take
daily
6–12 mg
Particularly effective for computer vision syndrome and digital eye strain.
Before you take it
- No NIH ODS Tolerable Upper Intake Level (UL) has been established for supplemental astaxanthin. The EFSA/JECFA acceptable daily intake (ADI) for natural astaxanthin is 0.2 mg/kg body weight per day (~14 mg/day for a 70 kg adult) per 2018 EFSA assessment. Most human supplement studies use 4–12 mg/day.
- Warfarin/anticoagulant drug interaction: one published case report documents INR elevation from 1.4 to 10.38 with probable causality (PMID 31073352); proposed mechanism includes enhanced protein C and antithrombin III activity. Concurrent use with anticoagulants warrants intensive INR monitoring.
- Avoid during pregnancy and lactation: no adequate human safety studies exist in these populations; most practitioners recommend avoiding as a precaution.
- Blood pressure lowering: small reductions in diastolic blood pressure have been observed in some studies; caution warranted with concurrent antihypertensive medications due to possible additive hypotensive effect.
- FDA GRAS (Generally Recognized as Safe) status applies to natural astaxanthin from Haematococcus pluvialis at supplemental doses up to 12 mg/day; a safety review of 87 human studies found no safety concerns at doses up to 40 mg/day. Synthetic astaxanthin (petrochemical-derived; used in aquaculture) is a structurally related but distinct product not typically used in dietary supplements.
What we make of it
The paper we cite is about food allergy and contains no astaxanthin at all.
The detail
The citation resolves to a paper on skin-gut interaction in food allergy — nothing to do with astaxanthin or eyes. It has to be replaced. The underlying idea is plausible and there are small Japanese trials behind it, but this is not one of them.