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l carnitine benefits for male fertility L-Carnitine is a Vital – Naître L-carnitine for Sperm Motility: Boost
Description
however, concluding the reasons for the observed changes is a complex task

It's an in-vitro finding - cells in a dish, not people

investigated the relationship of serum 25-OH vitamin D concentrations in patients with NF1 and found a statistically-significant inverse relationship between the number of dermal neurofibromas and serum levels of this hormone 93

Ullrich A, Schlessinger J: Signal transduction by receptors with tyrosine kinase activity

The antioxidant defense system cannot fully eliminate the toxic ROS accumulated in the cells, that is, the so-called oxidative stress occurs [18]
