They are usually part of a broader weight management approach
There's a structural problem, too
Whey (made from milk) naturally contains some L-Carnitine, and plant-based sources contain it in small amounts, like nuts, seeds, whole grains and some fruits and vegetables (like avocados and asparagus)
The involvement of OCTN1 in cancer metabolism, is probably unrelated to the poor ability of this transporter to mediate carnitine transport, however, it is interesting to know that OCTN1 is involved in the uptake of anti-cancer drugs (Table 1) such as Cytarabine (Drenberg et al., 2017), Camptothecin (Zheng et al., 2016), mitoxantrone and doxorubicin (Okabe et al., 2008)
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