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10.1155/2018/5416923 135 PranziniE.PardellaE.MuccilloL.LeoA.NesiI.SantiA.et al (2022)
Thus, even though the production of T4 and T3 is diminished in chronic illness, the reduced transport into the cell will tend to raise serum levels, making the serum T4 and T3 remain normal or high-normal (see Figure 2)
10.1016/j.ejmech.2022.114115 230 WeiM.GaoY.ChengD.ZhangH.ZhangW.ShenY.et al (2022b)
It is similar to walking into a restaurant when the hostess is on break you end up standing around in clusters, while some wander to a random table or just leave without fueling up. For purists, L-carnitines action relative to beta-oxidation occurs between the outer and inner mitochondrial membrane, but lets keep it simple for claritys sake