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Very rare but more serious side effects include irregular heartbeats/ palpitations or in extremely rare cases can cause an allergic reaction (anaphylaxis) but I have an EpiPen at hand to treat you immediately should this extremely rare occurrence happen.

If your body has an electrolyte imbalance, water alone wont fully rehydrate you

Due to their small molecular size, they can penetrate the skin as messenger molecules, effectively acting on both the internal and external scalp environment

For more on B12 form and absorption, see our guide to liquid vitamin B12, and on whether B12 affects the scale, our B12 and weight loss explainer