Ingredient guide
Vitamin B6, or pyridoxine, is an essential vitamin for the nervous system, metabolism, and making neurotransmitters. Deficiency is uncommon, and importantly, long-term high doses can cause nerve damage, so the upper limit matters.
Moderate evidenceVitamin B6 is an essential water-soluble vitamin, often listed as pyridoxine. Essential means your body cannot make it, so it has to come from food. It is found in poultry, fish, potatoes, chickpeas, bananas, and fortified cereals. Because it dissolves in water, your body does not store large reserves.
B6 is a workhorse cofactor. More than 100 enzymes use its active form to run reactions, especially those that handle amino acids from protein and those that build neurotransmitters, the chemical messengers in your brain. It also helps form haemoglobin, the molecule that carries oxygen in your blood.
The strongest evidence is the basic nutrition story. A genuine B6 shortfall causes real problems, including skin changes, a sore mouth, low mood, and nerve symptoms, and correcting it resolves them. B6 is also a well-established option, guided by a clinician, for easing nausea in early pregnancy.
B6 carries an unusual warning that sets it apart from most vitamins. Too much, taken for too long, is harmful. Sensory nerve damage has been reported with sustained high intakes, classically above 1,000 mg per day but in rare cases lower. That is why the upper limit sits at 100 mg per day. We grade the evidence as moderate, with a clear deficiency story and a clear ceiling you should respect.
Most people get enough B6 from a varied diet, so extra is rarely needed. The practical risk today is accidental high intake from stacked products, since B6 hides in many combined formulas. Add up your total across everything you take and keep it under 100 mg per day unless your healthcare provider has advised a specific higher dose for a reason.
The adult recommended intake is about 1.3 mg to 1.7 mg per day, usually met by food. The tolerable upper limit is 100 mg per day for adults. Higher amounts are used only under medical guidance. Long-term doses well above the limit can cause nerve damage. Ask your healthcare provider before taking high-dose B6.
Yes. Long-term high doses can damage sensory nerves, causing numbness and tingling. The adult upper limit is 100 mg per day from all sources.
It is a cofactor for more than 100 enzyme reactions, including making neurotransmitters and processing protein, fat, and carbohydrate.
No. It is uncommon in people who eat a varied diet, though certain medicines and conditions can lower B6 levels.
Add up the B6 in every product you take. It appears in many combined formulas, so stacking them can quietly push you over the 100 mg limit.
