Study summary · research use only
Role of L-carnitine in female infertility
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This is a review discussing the roles of L-carnitine (LC) and acetyl L-carnitine (ALC) in regulating oxidative and metabolic status of the female reproductive system. The review summarizes findings from in vivo and in vitro studies involving human, animal, and assisted reproductive technology research, and proposes mechanisms including reducing cellular stress, maintaining hormonal balance, and enhancing energy production — for example, aiding β-oxidation in oocytes, stabilizing cell membranes via acetylation of phospholipids, and preventing free radical-induced DNA damage. The review states ALC is preferred for its antioxidant properties while LC is preferred for supporting cellular energy supply, describing both as having applications for women facing infertility disorders.
Abstract
L-carnitine (LC), and its acetylated form, acetyl L-carnitine (ALC), have immense functional capabilities to regulate the oxidative and metabolic status of the female reproductive system. The vulnerability of this system to free radicals demand for advanced strategies to combat them. For this purpose, the 'quasi vitamins' LC and ALC can be used either individually, or in combination with each other or with other antioxidants. This review (a) summarizes the effects of carnitines on female fertility along with the findings from various in vivo and in vitro studies involving human, animal and assisted reproductive technology, and (b) proposes their mechanism of actions in improving female fertility through their integrated actions on reducing cellular stress, maintaining hormonal balance and enhancing energy production. They reportedly aid β-oxidation in oocytes, maintain its cell membrane stability by acetylation of phospholipids and amphiphilic actions, prevent free radical-induced DNA damage and also stabilize acetyl Co-A/Co-A ratio for adequate acetyl storage as energy supply to maintain the robustness of reproductive cells. While both LC and ALC have their applications in improving female fertility, ALC is preferred for its better antioxidant properties and LC for amelioration of energy supply to the cells. These beneficial effects show great promise in its application as a treatment option for women facing infertility disorders.
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