如何知道雞肉變壞?

Appearance and color

Depending on whether you are using raw or cooked chicken, there are some important things to note when it comes to its appearance and color.

raw chicken

Before preparing the chicken, it is important to check its appearance for signs of spoilage.

Raw chicken should be light pink in color with chunks of white fat. If the meat is gray or green, or the fat is yellow, this is a sign of spoilage and you should discard the chicken.

That said, if the color of the chicken changes slightly, this is normal.

For example, you may observe a slight darkening or fading of the pink flesh, which is a normal result of oxymyoglobin (a red protein and pigment) converting to metmyoglobin upon exposure to oxygen.

While not always a sign of spoilage, it could mean the chicken is less fresh.

Generally, slight color changes are normal as long as the chicken is stored safely in the refrigerator or freezer.

Finally, discard the chicken if you notice any obvious signs of spoilage, such as mold growth. Unlike hard cheese, you can't just cut off the small portion where mold growth occurs, so you should discard the entire piece or batch of chicken.

cooked chicken

The cooked chicken should be white with no pink bits of meat. Pink meat is a sign that the chicken is undercooked.

If you are storing chicken as leftovers, be sure to store it in an airtight container in the refrigerator at 40°F (4°C) or lower for up to 3 days.

Be sure to put it in the refrigerator immediately after cooking or eating it - chicken will go bad if left in the "danger zone" of 40°F (4°C) to 140°F (60°C) more than a few hours.

Within this temperature range, bacteria grow exponentially and increase the risk of foodborne illness.

If you notice any obvious signs of mold growth or color change between placing the chicken in the refrigerator and planning to eat it, discard it.

If there are any seasonings or seasonings on the chicken, it may be difficult to spot mold or color changes.

This is why you should eat chicken within 3 days of cooking. Make sure the chicken is heated to at least 165°F (74°C), using a food thermometer to measure its internal temperature.

odor

A telltale sign of low-quality chicken is an unpleasant odor.

Raw, fresh chicken will have a very mild smell, or no smell at all. If your chicken has a very noticeable odor, such as a sour or sulfurous smell similar to rotten eggs, discard it.

However, you should never rely solely on smell to determine whether chicken is safe to eat.

People's sense of smell can vary, which means not everyone will notice a change in the smell of chicken. Therefore, watch out for other signs of corruption as well.

texture

The fresh raw chicken was shiny and somewhat soft in texture.

It shouldn't be slimy, gooey or slimy. If your hands have slimy residue after handling raw chicken, it means it has gone bad.

Cooked chicken is firmer and drier than raw chicken. If you notice any changes in texture, such as softness, stickiness, stickiness, or increased residue, it may no longer be safe to eat.

Purchase date and expiry date

In addition to obvious signs of spoilage, it's important to check the expiration date and consider when the chicken was purchased.

First, be sure to check the expiration date before buying chicken. You may notice that there may be two dates listed on the chicken package: the "package date" and the "best before" date.

The first refers to the date the chicken was packaged and is used by manufacturers and retailers rather than consumers.

Instead, you should refer to the "use by" (expiration) date. This is the date by which the manufacturer recommends that you use the food to experience the "highest quality."

If you plan to eat the chicken within 1-2 days, you can choose a package that is closer to its expiration date, usually on sale. If you don't plan to use fresh chicken before its sell-by date, it's best to freeze it for later use.

It's best to buy raw chicken at the end of your shopping trip. This reduces the time it spends in the cart in danger zones.

Be sure to take the chicken home immediately and place it in the refrigerator or freezer.

If sealed well, chicken will keep in the refrigerator for at least 9 months. Before putting the chicken in the refrigerator, write the date of purchase on the packaging to keep track of it.

Fresh uncooked chicken will keep in the refrigerator for 1-2 days.

If you have cooked chicken, it needs to be eaten within 3-4 days and should always be stored in the refrigerator.

generalize

Being able to tell when your chicken is going bad will help keep you and your family safe from foodborne illness.

Fresh, raw chicken is usually light pink in color with chunks of white fat, has little odor, and is soft and moist. If your chicken becomes slimy, smells bad, or changes color to yellow, green, or gray, these are signs that your chicken has gone bad.

Discard any chicken that has passed its sell-by date, been uncooked in the refrigerator for more than 2 days or cooked for more than 4 days, or been in the danger temperature range for more than 2 hours.

While these signs are useful, when in doubt, throw it away.

Related Products

Review

All comments are moderated before being published

HealthyPIG Magazine

View all
小朋友叫唔應?可能唔係無禮貌,而係科學:專注時真係聽唔到你

小朋友叫唔應?可能唔係無禮貌,而係科學:專注時真係聽唔到你

小朋友一睇YouTube、打機、畫畫,突然叫佢,佢完全聽唔到。係咪扮聾?係咪發展遲緩?抑或專注力問題? 研究顯示,大部分情況完全正常,與腦部的「選擇性注意力(Selective Attention)」同「過度專注(Hyperfocus)」有關,不代表有疾病。 什麼是「選擇性注意力」?(Sele...
高血壓|隱形殺手的成因、統計數據與科學研究

高血壓|隱形殺手的成因、統計數據與科學研究

  高血壓|隱形殺手的成因、統計數據與科學研究 快速導讀 高血壓係全球最普遍、但最容易被忽視嘅慢性病之一。 超過一半患者完全無症狀,但長期會破壞血管、增加中風同心臟病風險。 主要成因包括:高鹽、肥胖、缺乏運動、低鉀、飲酒、睡眠窒息症、壓力、吸煙、腎病等。 全球研究顯示:高鹽攝取加上肥胖...
為何肺癌早期大多沒有症狀?科學原理、風險因素與早期發現方法全解析

為何肺癌早期大多沒有症狀?科學原理、風險因素與早期發現方法全解析

肺癌一直是全球最常見、死亡率最高的癌症之一。令人憂心的是,大部分肺癌患者在早期(第一、二期)都沒有明顯症狀,往往直到腫瘤擴散、壓迫周邊結構或影響呼吸功能後才被發現。本文以科學角度深入講解:為何肺癌早期「靜悄悄」、身體不察覺?身體內部究竟發生了甚麼? 亦會加入實際的自我檢查策略與醫學建議。 一...
黑眼圈成因全解析:從生理、生活習慣到醫學對策

黑眼圈成因全解析:從生理、生活習慣到醫學對策

前言:為何黑眼圈總是揮之不去? 「黑眼圈」係現代人嘅常見問題之一。無論係通宵工作、壓力過大、過敏,甚至遺傳因素,都可能令眼底皮膚變黑或出現陰影。雖然多數情況屬於美容問題,但有時亦可能反映身體狀況,例如貧血、睡眠質素差、血液循環不良等 [1]。  一、黑眼圈的主要類型與成因 色素型黑眼圈(Pi...
智慧手錶 vs 專用 O₂Ring 血氧儀:血氧監測能力的科學比較

智慧手錶 vs 專用 O₂Ring 血氧儀:血氧監測能力的科學比較

1. 前言 血氧飽和度(SpO₂)是評估呼吸、循環系統狀態的重要指標。近年來,市面上兩大類可穿戴設備用於血氧監測: 智慧手錶(如 Samsung Watch、Apple Watch) 專用血氧監測設備(如 O₂Ring、指夾式脈搏血氧儀) 兩種設備的設計目的、測量方式、準確性、監測...
血氧飽和度、氧氣下降與「警戒線」的科學探討

血氧飽和度、氧氣下降與「警戒線」的科學探討

1. 前言 血氧飽和度(SpO₂)即血液中氧合血紅蛋白佔總血紅蛋白的百分比,是臨床及居家監測呼吸、循環功能的重要指標。當血氧飽和度下降,可能反映體內氧的供應或運送出現問題(低氧血症、hypoxemia)或更廣泛的組織缺氧(hypoxia)[1][2]。本文旨在探討: 血氧飽和度正常範圍與變...
冰敷(Cold Therapy)真正作用全面解析:止痛、減腫,還是幫助修復?|科學視角 + 實證文獻

冰敷(Cold Therapy)真正作用全面解析:止痛、減腫,還是幫助修復?|科學視角 + 實證文獻

冰敷(Ice Pack / Cold Therapy / Cryotherapy)係好多運動、急性受傷(如扭傷、撞擊、肌肉拉傷)時的第一時間處理方法。但不少人會疑惑: 「冰敷純粹止痛,定係真係會幫助組織修復?」「冰敷幾耐?冰敷幾多日?會唔會影響身體自然修復?」 本文從科學、醫學、運動治療角度,...
長時間保持同一姿勢後關節痛、僵硬、郁唔到:成因、科學解釋與改善方法

長時間保持同一姿勢後關節痛、僵硬、郁唔到:成因、科學解釋與改善方法

前言:為何「坐耐、蹲耐、跪耐」之後會痛? 無論係坐喺電腦前、跪低執嘢、長時間翹腳、側睡又唔郁——好多人體驗過一樣情況: 「一動就痛、一企起身腳軟、膝蓋直唔到、關節卡卡聲,又或者要行幾步先鬆返。」 其實呢種情況係非常普遍,而且通常並非關節已經壞死,而係 和關節生理、滑液循環、血液供應、肌肉張力 ...
魚醒味的科學:成因、風險與處理方法全面解析

魚醒味的科學:成因、風險與處理方法全面解析

「魚醒味」是華人烹飪文化中常見的說法,用以描述魚類在 解凍、切片或加熱後所突然出現的腥味、血水味或脂肪味。此現象並不代表食材變壞,但背後牽涉到蛋白質變化、脂肪氧化與揮發性化合物釋放等多種科學機制。本文將以科學角度剖析魚醒味的成因,並提供實證方法降低這種味道,同時探討其安全性。 🧪 什麼是「魚...