Table 2.
Carotenoid ratios in eye care supplements
| Supplement | L:Z | L:MZ | ||||
|---|---|---|---|---|---|---|
| Declared | Measured | Conf. interval | Declared | Measured | Conf. interval | |
| EyePromise restore® | 0.5 | 3.8* | – | – | 113.0 | – |
| Ultra Lutein® | 23.3 | 9.8 | (9.4, 10) | – | 116.5 | – |
| CentroVision® L forte | 13.5 | 8.3 | (8.0, 8.5) | – | 132.7 | – |
| VitaluxPlus® | 5 | 10.8 | (10.4, 11.3) | – | 111.4 | – |
| Ocuvite® L Plus | 5 | 9.3 | (8.9, 9.6) | – | 7.0 | – |
| Nutrof®omega | 5 | 10.1 | (9.7, 10.6) | – | 7.4 | – |
| Preservision AREDS2® | 5 | 3.7 | (3.6, 3.8) | – | – | – |
| MacuHealth with LMZ3® | 5 | 5.0 | (4.6, 5.6) | 1 | 0.91 | (0.81, 0.99) |
| MacuShield® | 5 | 4.8 | (4.7, 5.0) | 1 | 0.95 | (0.92, 0.996) |
Declared lutein:zeaxanthin ratios (L:Z) and lutein:meso-zeaxanthin ratios (L:MZ) were obtained by dividing the amount of declared L by the amount of declared Z or MZ, respectively. Measured ratios were obtained from the amounts of quantified L, Z and MZ. 95 % confidence intervals are displayed
* Bias in the measured L:Z ratio (esterified Z not quantified for this supplement)
– Non-applicable, MZ is not declared by the supplement