THORNE B-Complex #6 - Vitamin B Complex with Active Forms of Essential B Vitamins & Extra B6 (60 Capsules)

Benefits of B-Complex

B vitamins are essential for turning food into energy. They act as coenzymes in metabolic pathways that break down carbs, fats, and proteins, which is why they're a preferred for anyone wanting steady energy all day. For athletes, B vitamins support creatine conversion, helping with explosive power and strength during training.

Nervous system health is another key advantage. Vitamin B6, especially, is essential for making neurotransmitters like serotonin and dopamine, which affect mood and focussed. THORNE B-Complex #6 has extra B6 to support neurological function and keep your mood balanced during stressful times, like competition. The formula also helps with magnesium bioavailability, which can cut down on muscle cramps during exercise.

Healthy red blood cell formation relies on B12 and folate. Good levels ensure oxygen moves efficiently to tissues, boosting endurance and recovery. B vitamins also help with healthy homocysteine metabolism, important for heart health.

Key Ingredients & Forms

The effectiveness of a B-Complex comes down to the forms of vitamins used. THORNE B-Complex #6 uses active, methylated forms for best absorption and use.

• Vitamin B1 (Thiamine) as thiamine pyrophosphate – the coenzyme form.
• Vitamin B2 (Riboflavin) as riboflavin 5’-phosphate – the active coenzyme form.
• Vitamin B3 (Niacin) as niacinamide – a flush-free form that supports energy metabolism.
• Vitamin B5 (Pantothenic Acid) as calcium pantothenate – essential for coenzyme A synthesis.
• Vitamin B6 (Pyridoxine) as pyridoxal 5’-phosphate (P5P) – the active form that skips liver conversion and is especially helpful for people with MTHFR gene variants.
• Vitamin B7 (Biotin) as d-biotin – supports macronutrient metabolism.
• Vitamin B9 (Folate) as L-5-methyltetrahydrofolate (5-MTHF) – the active form of folate, unlike folic acid which needs enzymatic conversion.
• Vitamin B12 (Cobalamin) as methylcobalamin – the active coenzyme form used in methylation and nerve health.
• Choline as choline bitartrate – supports neurotransmitter production and cell membrane integrity.

Using active forms means even people with genetic polymorphisms that stop them converting can still get full benefit.

How to Take B-Complex

Take one capsule daily with a meal. B vitamins are water-soluble, so taking them with food can help absorption and reduce the chance of stomach upset. Regular daily use is best to keep levels up. Since B vitamins aren't stored much, consistent intake helps maintain energy and nerve function.

Many people prefer taking B-Complex in the morning because of its energising effect. Avoid taking it late in the day if you're sensitive to stimulation, as it might affect sleep. B-Complex can be used with other supplements like magnesium or vitamin D, but check with a healthcare professional if you're taking multiple high-dose products.

Side Effects and Interactions

B-complex supplements are generally well tolerated. A common side effect is bright yellow urine from extra riboflavin – this is harmless and temporary. Some people might get mild nausea, digestive upset, or a flushing feeling from niacin (though THORNE uses niacinamide, which doesn't cause flushing).

High doses of vitamin B6 (over 100 mg per day) taken long-term have been linked to nerve toxicity. THORNE B-Complex #6 has a safe amount of B6 (20 mg as P5P) that fits with recommended daily intakes. Always follow the suggested serving size. If you're taking medications like anticonvulsants, chemotherapy drugs, or proton pump inhibitors, talk to your doctor before starting any new supplement, as B vitamins can interact with some meds.

Pregnant or breastfeeding women should get medical advise before use. This product is not meant for children unless a doctor says so.

How to Choose the Right B-Complex

When picking a B-Complex, look at the forms of each vitamin. Many standard supplements use cheaper, inactive forms like folic acid and cyanocobalamin, which need enzyme conversion that can be inefficient in some people. THORNE B-Complex #6 uses only active forms, making it a top choice for those with MTHFR mutations or anyone wanting maximum bioavailability.

Third-party certification is also important. THORNE B-Complex #6 is NSF Certified for Sport, meaning it's been tested for over 280 banned substances and meets strict label accuracy standards. This gives peace of mind for athletes who undergo drug testing. THORNE is also the most recommended clinical brand by healthcare practitioners and is trusted by over 100 pro sports teams.

Check allergens: this product is free from gluten, dairy, soy, and artificial preservatives. It's suitable for vegetarians and vegans. The formula has 60 capsules, a 60-day supply at one capsule per day.

Frequently Asked Questions

What does “active form” mean?

Active forms are the biologically available versions of vitamins that your body can use straight away without needing to convert them. For example, methylcobalamin is the active form of B12, while cyanocobalamin is synthetic and must be converted in the liver. Active forms are especially good for people with genetic variations that affect conversion.

Is this product suitable for vegans?

Yes, THORNE B-Complex #6 is vegan-friendly. The capsules are made from hypromellose (a plant-based material), and none of the ingredients come from animals.

Why is there choline in a B-Complex?

Choline is often grouped with B vitamins because it supports nervous system function, particularly the production of acetylcholine, a neurotransmitter involved in memory and muscle control. Including choline boosts the formula’s brain-supporting qualities.

Can I take this with other Thorne supplements?

Yes, Thorne products are made to work together. B-Complex #6 goes well with magnesium, vitamin D, and omega-3 supplements. However, if you're taking multiple supplements, check with a healthcare professional to make sure dosages are appropriate.

What Is B-Complex?

B-Complex supplements give you all eight essential B vitamins in one handy formula. These water-soluble vitamins work together to support energy metabolism, nervous system function, and red blood cell formation. Each B vitamin has its own job, but together they're a powerhouse for overall health. THORNE B-Complex #6 stands out by giving each vitamin in its active, tissue-ready form, so your body can use them straight away without needing to convert.

The eight B vitamins are thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate (B9), and cobalamin (B12). Plus, this formula includes choline, a nutrient often grouped with B vitamins because of its role in neurotransmitter synthesis and cell membrane structure. THORNE B-Complex #6 is designed especially for athletes and active people who want top nutrition for best performance.

Always read the label and follow the directions for use. This product is not intended to diagnose, treat, , or prevent any disease.