| Lokaewmanee et al. (2013) | Japan | Red pepper | Capsanthin and capsaicin | 0–5.0 | ↑ yolk color↑ villi height |
| Nobakht (2015) | Iran | Watermelon skin | β-Carotene | 0–2.0 | ↑ performance |
| An et al. (2019) | South Korea | Tomato paste | Lycopene | 0–17.0 | ↑ egg production↑ yolk lycopene |
| Grela et al. (2020) | Poland | Alfalfa | β-Carotene | 0–30.0 | ↑ yolk color and PUFA |
| Moeini et al. (2013) | Iran | Red pepper, marigold | Zeaxanthin and lutein | 0–3.0 | ↑ yolk color↓ cholesterol |
| Oliveira et al. (2017) | Brazil | Red pepper, marigold | Lutein and zeaxanthin | 0–7.0 | ↑ yolk color |
| Moreno et al. (2020) | Spain | New maize gen (Ph3, BKT) | β-Carotene | 0–62.06 | ↑ yolk color |
| Tufarelli et al. (2021) | Italy | Dried tomato pomace | Lycopene | 0–15.0 | No significant effect |
| Krawczyk et al. (2015) | Poland | Lupinus luteus | β-Carotene | 0–300.0 | ↑ yolk color and final body weight |
| Kotrbáček et al. (2013) | Czech Republic | Chlorella algae | Lutein and zeaxanthin | 0–20.0 | ↑ yolk color↑ yolk carotenoid |
| Bidura et al. (2020) | Indonesia | Moringa oleifera leaves | β-Carotene | 0–6.0 | ↑ performance, egg quality↓ yolk cholesterol |
| Kulshreshtha et al. (2017) | Canada | Chondrus crispus and Sarcodiotheca sp. | Carotene | 0–40.0 | ↑ immunity↓ radical effect |
| Zhu et al. (2021) | China | Phaffia rhodozyma | Astaxanthin | 0–1.6 | ↑ yolk color, immunity↓ MDA blood |
| Ao et al. (2015) | USA | Schizochytrium limacinum | Carotene | 0–30.0 | ↑ egg yolk color and DHA |
| Ekmay et al. (2015) | USA | Desmodesmus spp., Staurosira spp. | Carotene | 0–117.0 | ↑ digestion in ileum↑ protein metabolism |
| Magnuson et al. (2018) | USA | Haematococcus pluvialis(algae) | Astaxanthin | 0–0.08 | ↑ yolk carotenoid↓ free radicals |
| Rutkowski et al. (2017) | Poland | L. luteus L. | Xanthophyll | 0–250.0 | ↓ performance↑ yolk color |
| Al-Nedawi et al. (2014) | Iraq | Fruit extracts | Lycopene and carotene | 0–0.20 | ↑ egg production↑ egg quality |
| Omri et al. (2017) | Tunis | Linseed, tomato, paprika, fenugreek | Carotene | 0–45.0 | ↑ egg weight and feed intake |
| Altuntaş and Aydin (2014) | Turkey | Marigold (Tagetes erecta L.) | Lutein and zeaxanthin | 0–20.0 | ↑ SFA↓ MUFA |
| Sriagtula et al. (2019) | Indonesia | Indigofera leaves | Xanthophyll | 0–6.00 | No significant effect |
| Sun et al. (2020) | China | Fermented Rhodotorula mucilaginosa | β-Carotene | 0–12.5 | ↑ performance↑ yolk color |
| Duru et al. (2017) | Turkey | Daucus carota leaves | Capsanthin and capsaicin | 0–8.00 | ↑ internal and external egg quality |
| Titcomb et al. (2019) | USA | Marigold, carrot leaves | Lutein and zeaxanthin | 0–40.0 | ↑ yolk carotenoid↑ yolk color |
| Shevchenko et al. (2021) | Ukraine | Haematococcus algae, LycoRed | Lycopene, astaxanthin | 0–0.09 | ↑ yolk color↑ egg quality |
| Englmaierová et al. (2013) | Czech Republic | Lutein, chlorella | Lutein and zeaxanthin | 0–12.5 | ↑ yolk color↑ shell strength |
| Laudadio et al. (2014) | Italy | Alfalfa | β-Carotene | 0–150.0 | ↑ yolk carotenoid↑ yolk color |
| Skřivan et al. (2015) | Czech Republic | Marigold flowers | Lutein and zeaxanthin | 0–0.35 | ↑ yolk color↑ egg quality |
| Zheng et al. (2019) | China | Alfalfa | β-Carotene | 0–100.0 | ↓ yolk cholesterol↑ yolk color |
| Salajegheh et al. (2012) | Iran | Tomato | Lycopene | 0–190.0 | ↑ egg yolk color |
| Panaite et al. (2021) | Romania | Kapia pepper, sea buckthorn, carrot | β-Carotene | 0–20.0 | ↑ egg yolk color |
| Honda et al. (2020) | Japan | Paracoccus carotinifaciens Panaferd-AX dan P | Astaxanthin | 0–0.008 | ↑ egg yolk color and egg quality |
| Spasevski et al. (2018) | Serbia | Dried carrot, paprika | Carotene | 0–15.0 | ↑ performance↑ yolk carotenoid |
| Grčević et al. (2019) | Croatia | Marigold flowers | Lutein | 0–2.00 | ↑ egg yolk color |
| Shahsavari (2015) | Iran | Paprika, carrot, alfalfa, tomato | Oxycarotenoid (xanthophyll) | 0–50.0 | No significant effect |
| Siti et al. (2019) | Indonesia | M. oleifera leaves | β-Carotene | 0–60.0 | ↑ shell thickness↑ egg yolk color |
| Skřivan et al. (2016) | Czech Republic | Marigold flower | Lutein and zeaxanthin | 0–0.95 | ↑ egg yolk color |
| Panaite et al. (2019) | Romania | Dried tomato waste | Lycopene | 0–75.0 | ↑ yolk carotenoid and color |
| King and Griffin (2015) | USA | Tomato pomace | Lycopene | 0–10.0 | No-significant effect |
| Bidura et al. (2021) | Indonesia | Fermented carrot leaves | Carotene | 0–60.0 | ↑ yolk color↓ yolk cholesterol |
| Spasevski et al. (2017) | Serbia | Marigold flowers, paprika | Lutein and zeaxanthin | 0–15.0 | ↑ egg yolk color |
| Saleh et al. (2021) | Egypt | Paprika | Lutein and zeaxanthin | 0–4.00 | ↑ yolk color, fatty acids↑ egg production |
| Akdemir et al. (2012) | Turkey | Tomato | Lycopene | 0–10.0 | ↑ egg quality↓ FCR |
| Habanabashaka et al. (2014) | Rwanda | Tomato (peel and seed) waste meal | Lycopene | 0–9.00 | ↑ yolk color and carotenoid↓ yolk cholesterol |
| Walker et al. (2012) | USA | Algae astaxanthin | Astaxanthin | 0–2.94 | ↑ egg weight |
| Omri et al. (2019) | Tunis | Arthrospira platensis | β-Carotene | 0–2.50 | ↑ egg yolk color, HU |
| Tamiru et al. (2021) | Belgium | Papaya pomace | β-Carotene | 0–7.50 | ↑ egg production, yolk color↓ feed cost |