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Can I Take Ashwagandha and Vitamin B6 Together?

Reviewed and updated: 10 August 2026 Yes, in most cases you can take ashwagandha and vitamin B6 together, and the two are often combined in a single formula for exactly that reason. They work in very different ways: ashwagandha is a botanical (an Ayurvedic root traditionally used as an adaptogen), while vitamin B6 is an essential nutrient that carries several authorised UK function claims. This guide explains what each one is, what the research does and does not show, sensible amounts, timing, who should be cautious, and how to read a label honestly. Can you take ashwagandha and vitamin B6 together? The short answer Taking ashwagandha and vitamin B6 together is common and, for most healthy adults, there is no known reason the two cannot be used at the same time. In fact, many UK formulas (including our own) pair a standardised KSM-66 ashwagandha root extract with a modest amount of vitamin B6, because the vitamin has authorised roles in the nervous system and everyday metabolism while the botanical is valued for its heritage and composition. The one genuine safety point to understand is about very high-dose B6 taken over long periods, which we cover in full below. TL;DR quick answer What it is: A pairing of ashwagandha (a botanical root extract) with vitamin B6 (an essential water-soluble vitamin). They are not the same category and do not compete. Who it is for: Adults looking to combine a well-standardised adaptogen with a B vitamin that supports normal nervous-system and psychological function. Can they be combined: Generally yes for healthy adults, and they are frequently formulated together. Key risk: Very high daily doses of vitamin B6 over months can, in some people, cause reversible nerve symptoms. Sensible amounts stay well within safe limits. Ashwagandha is not advised in pregnancy or breastfeeding. Honest evidence note: Human research on ashwagandha for stress and cortisol is promising but rated low-certainty; there is very little research on ashwagandha combined specifically with B6. What ashwagandha is (and what it is not) Ashwagandha (Withania somnifera) is a small shrub whose root has been used for centuries in Ayurveda, the traditional medicine system of India, where it is classed as a "Rasayana" or rejuvenating herb and is often described as an adaptogen. The active compounds most associated with the root are a family of naturally occurring steroidal lactones called withanolides. Concentrated extracts such as KSM-66 are made from the root only and are standardised so that each serving delivers a consistent percentage of withanolides. It is important to be clear and honest here. In the UK, botanicals like ashwagandha hold no authorised health claims. That means a supplement cannot lawfully state that ashwagandha treats, reduces or improves anything. We can describe what it is, how it is grown and standardised, and its long traditional use, and we can discuss the published science as science, but the botanical itself stays claim-free. To learn more about the extract, see our explainer on what KSM-66 ashwagandha is and what an adaptogen actually means. What vitamin B6 does Vitamin B6 (found in supplements as pyridoxine, and active in the body as pyridoxal-5-phosphate) is an essential water-soluble vitamin that acts as a coenzyme in more than one hundred reactions, particularly in amino acid, carbohydrate and fat metabolism. Unlike ashwagandha, vitamin B6 does carry authorised EFSA and GB function claims when a product provides at least 15% of the Nutrient Reference Value (the NRV for B6 is 1.4 mg). Stated in the exact permitted wording, vitamin B6 contributes to: normal energy-yielding metabolism normal functioning of the nervous system normal psychological function the regulation of hormonal activity the reduction of tiredness and fatigue normal red blood cell formation normal homocysteine metabolism the normal function of the immune system These are the vitamin B6 claims, and they apply to the vitamin B6 in a formula, not to the ashwagandha. This is the compliant way to talk about a combined product: the botanical is described on its composition and heritage, while the qualifying vitamin carries its own authorised wording. Why the two are often combined Pairing a standardised adaptogen with a B vitamin is a formulation choice rather than a promise. Ashwagandha is included for its heritage and its standardised withanolide content, while vitamin B6 is added because it has genuine, authorised roles in the nervous system, in psychological function and in the regulation of hormonal activity. Our own formula is a five-part blend taken as one capsule daily: KSM-66 ashwagandha root extract 250 mg (5% withanolides, 12:1), L-theanine 100 mg, L-tryptophan 100 mg, black pepper extract 20 mg (10:1) and vitamin B6 1.7 mg at 121% of the NRV. You can read why the amino acid is there in our note on why L-theanine is added to ashwagandha, and about the pepper component in what piperine is and what it does. What the research shows (and its limits) Here we are paraphrasing published science, not making product claims. Most human research has looked at ashwagandha on its own rather than in combination with vitamin B6. A 2022 systematic review and meta-analysis of randomised controlled trials in Phytotherapy Research pooled twelve trials in just over a thousand adults and reported that ashwagandha supplementation was associated with lower perceived stress scores compared with placebo, with most trials using 300 to 600 mg a day. Crucially, the authors rated the certainty of the evidence as low and called for larger, higher-quality studies (DOI: 10.1002/ptr.7598). According to PubMed, a separate 60-day randomised, double-blind, placebo-controlled trial in stressed but healthy adults reported greater reductions in morning cortisol with a standardised ashwagandha extract than with placebo, and the authors suggested the effect may involve the hypothalamic-pituitary-adrenal axis (DOI: 10.1097/MD.0000000000017186). The honest summary is this: the direction of the research is encouraging, the trials are mostly short and small, the certainty is officially rated low, and there is very little published work on ashwagandha combined specifically with vitamin B6. That is why we describe the science transparently and do not translate it into a benefit for any product. Typical amounts and forms In the trials above, standardised ashwagandha root extract was typically used at 300 to 600 mg a day, most often as a KSM-66 or similarly standardised extract taken once daily. Worth knowing when comparing labels: extract concentration changes what a milligram figure means, so 250 mg of a 12:1 standardised extract is equivalent to around 3,000 mg of root powder, and the fair comparison between products is the withanolide content and extract ratio together rather than the raw milligram number. For vitamin B6, the UK Reference Nutrient Intake is roughly 1.4 mg a day for men and 1.2 mg a day for women, and the NRV used on labels is 1.4 mg, so even a small supplemental amount comfortably meets the 15% threshold needed for the authorised claims. A sensible combined product provides a modest amount of B6, not a mega-dose. Timing and whether to take with food There is no strict rule on timing for this pairing, and consistency matters more than the exact hour. Many people take a combined ashwagandha and B6 capsule with a meal, which can be gentler on the stomach. Some prefer the evening, others the morning; the research does not establish one clearly superior time. If you want a fuller discussion, see our guide on when to take ashwagandha, morning or night. Taking it at the same time each day makes it easier to stick with and to judge how you feel over several weeks. Safe upper limits: the vitamin B6 point to understand This is the single most important safety topic for this combination, and it is worth explaining plainly rather than glossing over. Vitamin B6 is water-soluble, so the body excretes what it does not use, but that does not make unlimited doses harmless. Taking very high amounts of B6 (well above everyday supplemental levels) over long periods has been linked to reversible peripheral neuropathy, meaning tingling, numbness or loss of feeling in the hands and feet. According to PubMed, a laboratory study known as "the vitamin B6 paradox" found that it is specifically the pyridoxine form, at high concentrations, that appears responsible, because pyridoxine can competitively inhibit the active pyridoxal-5-phosphate, so symptoms of excess can resemble symptoms of deficiency (DOI: 10.1016/j.tiv.2017.07.009). A wider review of vitamin neurotoxicity likewise identifies pyridoxine sensory neuropathy as one of the few well-established vitamin toxicities in humans (DOI: 10.1007/BF02935566). This is the reason some interaction checkers flag high-dose B6. The practical takeaway is reassuring but worth stating: UK guidance from the NHS is that taking 10 mg or less of supplemental B6 a day is unlikely to cause harm, and a sensibly formulated ashwagandha and B6 product sits well within that. Problems have generally involved much higher daily amounts taken for extended periods. If you already take a separate B-complex or multivitamin, add up your total B6 across everything so you do not unknowingly stack high doses. Ashwagandha itself has no formal tolerable upper intake level in the UK, and it is generally used short term; our ashwagandha safety guide covers this in more detail. Interactions and who should be cautious For most healthy adults the combination is well tolerated, but some people should take particular care or speak to their GP or pharmacist first: Pregnancy and breastfeeding: ashwagandha is not recommended during pregnancy or while breastfeeding. Thyroid conditions or thyroid medication: ashwagandha may influence thyroid hormone levels, so anyone with a thyroid disorder or taking thyroid medicine should seek advice first. Sedatives, sleep medicines or alcohol: ashwagandha may add to drowsiness, so caution is sensible if you take medicines that cause sedation. Autoimmune conditions: because ashwagandha may affect immune activity, those with autoimmune conditions should check with a clinician. Certain medicines and vitamin B6: high-dose B6 can interact with some drugs, including levodopa and a few anti-epileptic medicines, and can contribute to the nerve symptoms described above at high intakes. Keep total B6 modest. Existing liver or kidney conditions: anyone with a significant health condition, or taking prescription medication, should confirm suitability with a healthcare professional before starting. Side effects to be aware of Ashwagandha is generally well tolerated in short-term trials, though some people report mild digestive upset or drowsiness, particularly at higher amounts. Vitamin B6 at everyday supplemental levels is not usually associated with side effects; the concern, as above, is specific to high doses taken for a long time. If you notice any tingling or numbness in your hands or feet, stop and speak to a healthcare professional, as these symptoms usually improve once high-dose B6 is discontinued. Natural food sources of vitamin B6 Because vitamin B6 is a nutrient rather than a herb, you also get it from food. Good UK dietary sources include poultry, fish, eggs, potatoes and other starchy vegetables, bananas, chickpeas and other pulses, wholegrains and fortified breakfast cereals. Ashwagandha, by contrast, is not a food you would eat as part of a normal diet; it is used specifically as a supplement or traditional preparation. A varied diet supplies B6 for most people, and a supplement simply tops it up. Signs of vitamin B6 deficiency, and the honest reality check Frank vitamin B6 deficiency is uncommon in the UK but can occur, and signs may include a specific type of anaemia, skin changes such as a scaly rash, cracks at the corners of the mouth, low mood or confusion, and a weakened immune response. That leads to an honest point that applies to both ingredients: a supplement is most useful for correcting a genuine shortfall, and the authorised B6 claims describe support for normal function, not extra function in someone who is already replete. In other words, topping up a low intake is different from expecting an already well-nourished body to work better than normal. Keeping realistic expectations is part of choosing supplements sensibly, a theme we return to across our Pure Vitamins guides. How to choose a quality ashwagandha and vitamin B6 supplement When comparing products, look for a few concrete signals of quality rather than marketing language: Standardised root extract: a named, root-only extract such as KSM-66 standardised to a stated withanolide percentage tells you what you are actually getting. The concentration ratio: a stated ratio such as 12:1 tells you how concentrated the extract is, and it is what makes a milligram figure meaningful. Clear B6 amount and NRV: the exact milligrams of vitamin B6 and its NRV percentage should be on the label, and the amount should be modest, not a mega-dose. Honest claims: a compliant product describes ashwagandha on composition and heritage and reserves function claims for the vitamin B6, in the authorised wording. Full label transparency: every ingredient amount declared rather than hidden in a proprietary blend, and manufacturing in a GMP-certified facility. Suitability: check whether it fits your needs, for example a vegan-friendly formulation. Our own KSM-66 Ashwagandha with L-Theanine and Vitamin B6 is built around a root-only standardised extract with a measured amount of vitamin B6, so the vitamin carries its authorised nervous-system and psychological-function wording while the botanical is described transparently. It is formulated in the UK and manufactured in a GMP-certified facility. View our KSM-66 Ashwagandha with Vitamin B6 Frequently asked questions Can I take ashwagandha and vitamin B6 at the same time? Yes. For most healthy adults there is no known reason to avoid taking them together, and they are frequently combined in a single formula. The main thing to watch is your total daily vitamin B6 across all supplements, keeping it modest. Does ashwagandha contain vitamin B6 naturally? No. Ashwagandha is a botanical root extract and is not a meaningful source of vitamin B6. In combined products the B6 is added separately as a nutrient, which is why the label lists it with its own amount and NRV percentage. How much vitamin B6 is safe with ashwagandha? UK guidance from the NHS is that 10 mg or less of supplemental vitamin B6 a day is unlikely to cause harm. Sensibly formulated products stay within this. Very high doses over long periods have been linked to reversible nerve symptoms, so avoid stacking multiple high-B6 products. What does the vitamin B6 in the formula do? Vitamin B6 contributes to normal functioning of the nervous system, to normal psychological function and to normal energy-yielding metabolism, among other authorised roles, when a product provides at least 15% of the NRV. These claims apply to the vitamin B6, not to the ashwagandha. When should I take an ashwagandha and B6 supplement? There is no single best time established by research. Taking it with a meal and at a consistent time each day is a practical approach, and consistency over several weeks matters more than the exact hour. Who should avoid this combination? Ashwagandha is not recommended in pregnancy or breastfeeding, and people with thyroid or autoimmune conditions, those on sedative or thyroid medicines, and anyone on prescription medication should check with a GP or pharmacist first. Written by Dr. Miron, Founder of Pure Vitamins UK. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. This article is for general information and education only and is not medical advice. Ashwagandha is a botanical and carries no authorised health claims in Great Britain; references to research describe scientific findings and are not product claims. If you are pregnant, breastfeeding, have a health condition or take medication, speak to your GP or pharmacist before starting a new supplement.