2018: A double-blind, placebo-controlled study among women receiving taxane-based chemotherapy to treat breast cancer found that 3 grams of acetyl-L-carnitine taken daily for 5.5 months significantly WORSENED symptoms of chemotherapy-induced peripheral neuropathy compared to placebo, and this difference persisted after 2 years [7][28]
Causes: Steric hindrance from structural modifications Suboptimal digestion conditions Enzyme specificity limitations Impact: Missed cleavage sites Formation of larger, complex peptide fragments Reduced sequence coverage and mapping confidence 4
Bone Fractures In 2019, a study found an association between high intakes of vitamins B6 and B12 from food and supplements with the risk of hip fracture among postmenopausal women in the Harvard Nurses Health Study
In skeletal muscle, lower NAD+ has been linked to reduced physical function in older adults, per research published in Nature Aging
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