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10 Best b12 nasal spray

Welcome to our top 10 product reviews for b12 nasal spray. We've scoured the market to bring you the best of the best, with products ranging from a 7.1 score up to a whopping 9.8 score!

Updated December 2025
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1
Vitamin B12 Liquid Drops (3000 mcg) Made in UK by Nature Provides - Methylcobalamin + Adenosylcobalamin (50ml), High Strength, Bioactive, Vegan, Energy & Sleep Support, Sublingual, Like B12 injections
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9.8
Exceptional

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Vitamin B12 Liquid Drops (3000 mcg) Made in UK by Nature Provides - Methylcobalamin + Adenosylcobalamin (50ml), High Strength, Bioactive, Vegan, Energy & Sleep Support, Sublingual, Like B12 injections

Main Highlights

Why nature provides’ bioactive B12? Bioactive B12 provides you with a high strength (3000mcg per daily dose) and highly bioavailable source of Vitamin B12. The liquid formula uniquely combines both Methylcobalamin and Adenosylcobalamin, which are already in a methylated, active form, making them readily usable by the body without the need for conversion ( helpful for those with the MTHFR gene mutation, which around 35% of the population have but are not aware). 


How to take bioactive B12? Easy to take and tasteless, Bioactive B12 is designed to be taken sublingually (under the tongue) for optimal absorption. Simply take 1ml (13 drops) and hold the liquid under your tongue for 30 seconds before swallowing. This method bypasses the gastrointestinal tract, allowing it to go directly into your bloodstream for faster and more effective results. The liquid formula makes it easy to adjust the dose to suit your daily requirements.

Support your health: Bioactive B12 promotes Mental Focus, a Healthy Nervous System, Cardiovascular Health (by fighting homocysteine), Energy Production, Adrenal Function and supports your Immune System. B12 is an essential vitamin which is involved in a significant number of actions within the body.

Premium quality, no additives: With just 3 ingredients (Methylcobalamin, Adenosylcobalamin and reverse osmosis water) Bioactive B12 is Vegan-friendly, 100% GMO-Free and contains NO colours, flavourings, sugar or preservatives. Packaged in Miron UV-proof glass for natural protection against UV light, we use only the purest ingredients.

Customer peace of mind: At Nature Provides, we aim to provide comprehensive information and support. If you have any questions, our friendly team is available to offer personalised assistance to help integrate this supplement into your lifestyle. We strive for 100% customer satisfaction and are here to help if you are not completely happy with your purchase.

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9.8
Exceptional
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4
Vitamin B12 Spray - 3000mcg High Strength - 60ml for 60 Day Supply - Vegan - Dual-Active Vitamin B12 Complex Liquid Formula for Maximum Absorption - B12 Oral Spray - Made in UK by Core Nutrition
9.2
Very Good

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Vitamin B12 Spray - 3000mcg High Strength - 60ml for 60 Day Supply - Vegan - Dual-Active Vitamin B12 Complex Liquid Formula for Maximum Absorption - B12 Oral Spray - Made in UK by Core Nutrition

Main Highlights

THE B12 YOU NEED: With a plethora of health benefits including immune, metabolic, psychological, cardiovascular, and overall energy, it’s critical that your body receive a high daily value of Vitamin B12. Since it mainly comes from meat and eggs, vegetarians, vegans and people with low-meat diets are less likely to receive the proper amount from day to day. B12 Spray from Core Nutrition allows you to quickly, easily and effectively provide all the Vit B you can use.

3000MCG PER SERVING: Our Vitamin B spray offers an unprecedented 3,000mcg per serving, and the 60ml bottle goes where you go and provides a two-month supply at that dosage. If the nature of your diet means you regularly absorb some B12, you can halve the dosage to receive a four-month supply at 1500mcg per serving.

MAXIMUM ABSORPTION: Since Vitamin B12 is a large molecule, your body can have a hard time absorbing it through the intestines. That’s why our Vit B12 spray contains both Methylcobalamin and Adenosylcobalamin and is absorbed directly into your bloodstream through the buccal membranes of your inner cheek. The result is more of this key nutrient in a form your body can truly harness.

MANUFACTURED TO STRINGENT STANDARDS: GMP, or Good Manufacturing Practices, is the gold standard for supplement manufacturing. We make our spray vitamins right here in the UK using processes which meet or exceed these standards. Once manufactured, we conduct lab and batch testing to ensure you’re receiving exactly what it says on the label in every bottle.

NATURAL HEALTH: We’ve carefully selected the ingredients in our Vitamin B12 spray to ensure it is vegan, non-GMO, gluten free, and free of artificial flavours. If you ever have any questions about our product or its use, we’re an email away with answers. Enjoy our natural berry flavour while you ensure you’re receiving enough Vitamin B12 in a form most useful to your body every day - click Buy Now and order your Core Nutrition Vit B12 Spray today!

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9.2
Very Good
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Products Considered

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Consumers Consulted

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Hours Researched

Why Trust One Clear Winner?

One Clear Winner spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own.

About One Clear Winner

How We Tested

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

Learn more about testing

51

Products Considered

62

Consumers Consulted

24

Hours Researched