Red flags on supplement labels These warning signs should make you think twice about buying a supplement: Proprietary blends hide actual ingredient amounts and often mask tiny quantities of expensive ingredients Extreme performance claims with phrases like "quick fix," "secret formula," or "what experts don't want you to know" usually mean deceptive marketing Artificial additives like magnesium stearate, silicon dioxide, and titanium dioxide might reduce absorption or build up in your body The biggest risks come from products that make disease claims or promise muscle building, weight loss, or sexual enhancement - these often contain unapproved ingredients
Certain groups should exercise particular caution: Individuals with hypothyroidism , as L-carnitine may interfere with thyroid hormone action at the tissue level Those with seizure disorders , as the levocarnitine SmPC notes a possible association with increased seizure frequency, particularly in those with a prior history People with kidney disease , for whom unsupervised supplementation is not advised Pregnant or breastfeeding women , for whom safety data remains limited When to seek help: Call 999 immediately if you experience severe chest pain, sudden shortness of breath, or symptoms that could indicate a heart attack or stroke Contact NHS 111 for urgent concerns that are not immediately life-threatening Contact your GP promptly if you experience palpitations, significant gastrointestinal symptoms, new or worsening seizures, or any unexpected changes in health after starting supplementation If you suspect you have experienced a side effect from a supplement or medicine, you can report it to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk
BRD4 degradation blocks expression of MYC and multiple forms of stem cell resistance in Ph+ chronic myeloid leukemia
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