Thorne Research

Purity means performance.

At Thorne, we know the purity of a supplement's raw ingredients makes the difference between an effective, well-tolerated product and an inferior, poorly absorbed one that may even cause allergenic reactions. That's why our commitment to using the purest ingredients possible is nothing short of obsessive.

Seek Natural will be listing many more Thorne Research products. If you can't find what you are looking for, please call us on 0843 289 9977.

Show:
Sort By:
Anti-Oxidant

A broad-spectrum antioxidant formula with phase I and II liver detoxification cofactors:

  • supports normal detoxification processes
  • much more than the basic A, C, E, and selenium antioxidants
  • provides glutathione and its precursors
  • made without flowing agents that can inhibit bioavailability
Pack Size:
Price: £41.39
Methylcobalamin

a bioactive form of vitamin B12

  • an active form of vitamin B12 more readily used by the body
  • supports cardiovascular health, nerve function, and sleep
  • without preservatives, magnesium stearate, or other lubricants and diluents
  • made without flowing agents that can inhibit bioavailability

 

 

Pack Size: 60 veg caps
Price: £28.50
Glucosamine Sulfate

An important nutrient for musculoskeletal support

  • helps maintain healthy joint function and mobility
  • supports normal cartilage formation
  • sodium-free glucosamine
  • backed by clinical research

 

 

Pack Size: 180 caps (vegetarian)
Price: £43.80
Bio-B12

Vitamin B12 and folic acid in a base of papain to enhance absorption

  • a unique Thorne product
  • a viable option to sublingual B12 products
  • without preservatives, magnesium stearate, or other lubricants and diluents
  • made without flowing agents that can inhibit bioavailability
Pack Size:
Price: £26.89
Fractionated Pectin Powder

patented, water-soluble modified citrus pectin in a powder

  • nutritional support for oncology patients
  • powder allows for taking high amounts
  • without preservatives, magnesium stearate, or other lubricants and diluents

 

 

Pack Size:
Price: £88.69
L-Glutamine Powder

Primary fuel for the cells lining the small intestine

  • promotes gastrointestinal and immune health
  • pure glutamine powder facilitates taking a higher amount
  • a nutrient that is essential for wound healing
  • contains no preservatives, magnesium stearate, or other lubricants and diluents

 

 

Pack Size: 12 oz (340 g)
Price: £84.70
Arabinex (Arabinogalactans)

excellent fiber source with immune-enhancing effects

  • powder allows for ease of supplementation, especially for kids
  • increases colonic short-chain fatty acids for intestinal health
  • supports the body's normal immune response
  • prebiotic fiber can increase beneficial bacteria in colon
Pack Size: 3.5oz (100g)
Price: £59.45
Moducare

Plant sterols and sterolins - an important advancement in naturally balancing the immune system

  • found naturally in all fruits and vegetables
  • provides an optimal sterol:sterolin ratio based on numerous clinical studies
  • helps maintain a healthy balance of T-helper 1/T-helper 2 white blood cells
  • modulates a stress response by supporting optimal DHEA:cortisol ratios
Pack Size:
Price: £63.90
Iodine & Tyrosine

Essential mineral and amino acid support for the thyroid gland

  • key nutrients for thyroid support
  • also promotes healthy adrenal function
  • made without flowing agents that can inhibit bioavailability

 

 

Pack Size: 60 veg caps
Price: £27.35
Bio-Gest

a comprehensive blend of digestive enzymes to aid in metabolism and gastrointestinal health

  • a blend of HCl, pepsin, pancreatin, and ox bile
  • promotes digestion of proteins, carbohydrates, and fats
  • ox bile added for fat emulsification
  • benefits individuals with occasional indigestion
Pack Size: 180 caps (vegetarian)
Price: £57.72
Calcium-Magnesium Citrate

Important macromineral partners

  • a 1:1 ratio of calcium and magnesium
  • efficiently absorbed form of these minerals
  • improved absorption in individuals with low stomach acid
Pack Size: 227g - Powder
Price: £25.29
L-Lysine

Amino acid essential for skin health, energy production, and immune function

  • essential amino acid for healthy protein synthesis
  • supports healthy immune function
  • excellent l-lysine source for vegetarians
  • contains no preservatives, magnesium stearate, or other lubricants and diluents

 

 

Pack Size:
Price: £20.39
Glycine

Inhibitory neurotransmitter and essential for detoxification

  • promotes relaxation for healthy stress management
  • essential for detoxification
  • made without flowing agents that can inhibit its bioavailability

 

 

Pack Size:
Price: £32.95
B-Complex #12

Two active forms of vitamin B12, plus two active forms of folate in one convenient B-complex

  • unlike many B vitamin products, B-Complex #12 contains the active forms for enhanced bioavailability
  • B-Complex #12 contains an optimal balance of essential B vitamins with extra vitamin B12 and folate
  • B-Complex #12 is yeast free
  • without preservatives, magnesium stearate, or other lubricants and diluents
  • made without flowing agents that can inhibit bioavailability
Pack Size: 60 veg caps
Price: £25.25
Myco-Immune

Best-researched mushroom extracts for immune system support.

  • in liquid form for easy titration and pediatric supplementation
  • reishi, maitake, and Cordyceps enhance T- and B-lymphocyte immune activity
  • shiitake and Coriolus help maintain a healthy balance of microorganisms
Pack Size:
Price: £52.45
Indole-3-Carbinol

To support estrogen metabolism

  • maintains optimal 2-hydroxy/16-hydroxy estrogen ratios
  • found in cabbage family vegetables, it's a source of DIM
  • nutritional support for liver detoxification
  • made without flowing agents that can inhibit bioavailability

 

 

Pack Size:
Price: £39.79
Biotin-8

Containing 8 mg of biotin per vegetarian capsule

  • helps maintain already normal blood sugar levels
  • supports healthy nerve function, skin, hair, and nails
  • without preservatives, magnesium stearate, or other lubricants and diluents
  • made without flowing agents that can inhibit bioavailability
Pack Size:
Price: £35.10
Calcium D-Glucarate

for enhanced liver detoxification

  • supports glucuronidation, an important liver detoxification pathway
  • prevents recycling of toxins back into the liver
  • supports healthy hormone metabolism
Pack Size:
Price: £61.49
L-Tryptophan

Precursor to serotonin, melatonin, and niacin

  • amino acid essential for brain serotonin and melatonin production
  • promotes relaxation, sleep, and good mood
  • contains no preservatives, magnesium stearate, or other lubricants and diluents
  • made without flowing agents that can inhibit its bioavailability

 

 

Pack Size:
Price: £56.69
B Complex #6 60 Veg caps

B-Complex #6

B-complex support with extra pyridoxine and pyridoxal 5'-phosphate

  • unlike many B vitamin products, B Complex #6 contains the active forms for enhanced bioavailability*
  • B-Complex #6 contains an optimal balance of essential B vitamins with extra vitamin B6 as pyridoxine and pyridoxal 5'-phosphate
  • B-Complex #6 is yeast free
  • without preservatives, magnesium stearate, or other lubricants and diluents
  • made without flowing agents that can inhibit bioavailability
Pack Size:
Price: £27.70
B.P.P. (Betaine/Pancreatin/Pepsin)

A broad-spectrum digestive support supplement

  • a blend of HCl, pepsin, and pancreatin
  • promotes digestion of proteins, carbohydrates, and fats
  • benefits individuals with occasional indigestion
Pack Size: 180 caps (vegetarian)
Price: £52.39
Vitamin A

Vitamin A

pure vitamin A for healthy vision, cellular development, and enhanced immunity*

  • high potency – 25,000 IU vitamin A palmitate per capsule
  • vitamin A plays an essential role in eye health, particularly for night vision*
  • vitamin A supports healthy bone growth, plus cellular growth and development*
  • vitamin A is an essential nutrient for maintaining healthy skin and immune system*

 

Pack Size:
Price: £18.50
Amino Complex Berry 231g

The comprehensive blend of essential amino acids in Amino Complex is high in branched-chain amino acids and has been validated through extensive clinical trials.

Pack Size:
Price: £65.59
Cal-Mag Citramate

Calcium-Magnesium Citramate - calcium and magnesium as the superior citrate-malate chelates

  • a 1:1 ratio of calcium and magnesium
  • highly absorbable form of these minerals
  • improved absorption in individuals with low stomach acid
Pack Size:
Price: £43.69
Childrens Basic Nutrients

Some customers have noted that the multiple vitamin-mineral formulas have a strong odor. This is particularly noticeable to patients who have been taking the multiples long-term. The change in odor is due to the fact that we have (over the past year) changed from selenium picolinate to selenomethionine. While we believe selenomethionine is a superior form of selenium, it does have a bit of a sulfur smell, which is normal and does not reflect a problem with the product.

A multi-vitamin-mineral supplement in small capsules, providing easy dosing for children of all ages

  • contains no sugar, binders, or allergenic excipients
  • provides only the purest, most bioavailable nutrients
  • in easy-to-swallow, kid-sized capsules
  • can be taken out of the capsule and mixed with food
Pack Size: 180 caps (vegetarian)
Price: £35.89
L-Tyrosine

Essential for neurotransmitter and thyroid hormone synthesis

  • important nutrient for healthy adrenal function
  • supports the thyroid gland
  • promotes a positive mental state and healthy stress management
Pack Size:
Price: £29.25
Buffered C Powder 227g

This Buffered Vitamin C Powder was designed by Thorne Research specifically for people who are sensitive to the acidity of pure ascorbic acid. Ascorbic acid is the pure version of vitamin C.

Pack Size: 227g - Powder
Price: £31.39
Bacillus Coagulans

A unique, stable probiotic organism that promotes gastrointestinal health

  • promotes a healthy gut flora
  • no refrigeration or special handling required
  • stable, healthy bacteria survives stomach acidity
Pack Size:
Price: £34.39
Iron Bisglycinate 25mg 60's

Iron contributes to normal oxygen transport within the body, it also plays a role in the normal function of the immune system and normal cognitive function.  It contributes to the reduction of fatigue and tiredness.

Thorne Research's Iron Bisglycinate provides 25 mg of elemental iron per capsule reacted with glycine for superior absorption

Pack Size:
Price: £19.60
Crucera-SGS

Advanced antioxidant support from broccoli seed extract

  • targeted chemoprotection
  • safe up-regulation of the Phase II detoxification enzymes
  • support for healthy vision and eyes
  • support for a healthy cardiovascular and gastrointestinal system
  • support for healthy joints

 

 

Pack Size:
Price: £77.20
Calcium Citramate

the best-absorbed form of calcium on the market

  • significantly better absorbed than calcium carbonate
  • a key nutrient for bone health
  • calcium citrate-malate enhances bone health even when supplemented alone
Pack Size:
Price: £20.29
Choleast™

Red yeast rice extract with coenzyme Q10 for support of healthy cholesterol levels

  • supports cardiovascular health by helping maintain already normal cholesterol levels
  • contains naturally-occurring monacolins
  • coQ10 enhances antioxidant activity
Pack Size:
Price: £51.29
M.F. Bromelain®

A mixture of potent proteolytic enzymes from pineapple

  • helps reduce bruising and swelling
  • promotes healing after trauma or surgery

 

 

Pack Size:
Price: £43.60
Glutathione-SR

Sustained-release glutathione for essential antioxidant support

  • available exclusively from Thorne Research
  • sustained-release glutathione for optimal blood levels
  • an important breakthrough in glutathione supplementation - the sustained-release formula allows twice-daily supplementation
  • the body's most important antioxidant and detoxification factor
Pack Size:
Price: £58.60
Basic B Complex

The Basic B-Complex formula has changed to include more vitamin B1, and to supply the most bioactive forms of folate (5-MTHF) and vitamin B12 (methylcobalamin).

comprehensive B complex support

  • unlike many B vitamin products, Basic B Complex contains the active forms for enhanced bioavailability
  • Basic B Complex contains an optimal balance of essential B vitamins
  • Basic B Complex is yeast free
Pack Size: 60 veg caps
Price: £30.00
Diosmin-HMC

Strengthens blood vessels

  • citrus flavonoids that support blood vessel health
  • strengthens veins, enhances circulation
  • safe during pregnancy

 

 

Pack Size:
Price: £33.49
Molybdenum Glycinate

An important trace mineral cofactor for sulfite metabolism

  • beneficial for individuals with sulfite sensitivity*
  • promotes liver detoxification*
  • made without flowing agents that can inhibit bioavailability

 

Pack Size:
Price: £20.09
Choleast-900

Contains 900 mg red yeast rice per capsule – 50 percent more than our original Choleast (still available), allowing easier dosing!

  • requires fewer capsules for desired effect
  • supports cardiovascular health by helping maintain already normal cholesterol levels*
  • synergistic effect of natural monacolins and phytosterols
Pack Size:
Price: £60.45

A well-absorbed form of magnesium

  • magnesium deficiency is common in the American diet
  • magnesium supplementation benefits energy production, cardiac function, carbohydrate metabolism, and pulmonary function
  • well-absorbed citrate chelate
  • supports good kidney function

 

 

Pack Size:
Price: £20.90
Cortrex

Whole adrenal and adrenal cortex in one capsule for healthy adrenal function*

Pack Size: 60 veg caps
Price: £26.80
Basic Detox Nutrients™

A comprehensive multiple vitamin-mineral with additional nutrients to aid in detoxification

  • with highly bioavailable flavonoid phytosomes – green tea, curcumin, and milk thistle
  • a unique multiple vitamin-mineral product designed for a toxic world
  • use as part of a complete cleansing program
  • use as a stand-alone product to mitigate exposure to environmental toxins
  • free of pre-diluted ingredients and hidden preservatives
Pack Size:
Price: £100.40
Dipan-9

pancreatic enzymes (pancreatin) for digestive support*

  • provides lipase, protease, and amylase for digestion of fats, proteins, and carbohydrates*
  • benefits individuals with occasional indigestion*
  • pure undiluted pancreatin; lactose-free and the highest potency and purity possible
Pack Size: 180 caps (vegetarian)
Price: £106.99
CystePlus®

N-acetylcysteine for liver support, detoxification, and immune support

  • well recognized for its powerful detoxification capability in the liver
  • strong antioxidant activity
  • supports good pulmonary health by decreasing the thickness of mucus
  • increases glutathione, a primary cellular antioxidant and detoxification factor

 

 

Pack Size:
Price: £35.80
Chromium Picolinate

an essential mineral for carbohydrate metabolism

  • supports already normal blood glucose levels
  • decreases carbohydrate cravings
  • an effective component of weight-loss regimens
  • made without flowing agents that can inhibit bioavailability
Pack Size:
Price: £23.00
Medibulk®

Providing important soluble fiber for a healthy GI tract

  • in a convenient powder for ease of mixing
  • enhances short-chain fatty acids to promote a healthy GI tract
  • helps maintain already normal cholesterol and blood sugar levels
  • a good source of soluble and insoluble fiber

 

 

 

Pack Size:
Price: £27.10
HMC-Hesperidin

Well-absorbed antioxidant flavonoid

  • a citrus flavonoid that supports blood vessel health
  • blood vessel stabilizing effects can reduce the incidence of menopausal hot flashes
  • stabilizes mast cells that store and release histamine
  • a water-soluble form of the flavonoid hesperidin

 

 

 

Pack Size:
Price: £27.49
Basic Nutrients III (w/o Cu & Fe)

Some customers have noted that the multiple vitamin-mineral formulas have a strong odor. This is particularly noticeable to patients who have been taking the multiples long-term. The change in odor is due to the fact that we have (over the past year) changed from selenium picolinate to selenomethionine. While we believe selenomethionine is a superior form of selenium, it does have a bit of a sulfur smell, which is normal and does not reflect a problem with the product.

A comprehensive multiple without copper and iron featuring citrate mineral chelates

  • free of pre-diluted ingredients and hidden preservatives
  • provides the active forms of folic acid – L-5-methyl-tetrahydrofolate and folinic acid in a balanced 1:1 ratio
  • does not contain magnesium stearate or stearic acid, which may inhibit absorption
  • provides the active, readily usable forms of vitamins B2 and B6
  • features trace minerals exclusively available from Thorne as picolinates and our own patented form of chromium – UltraChrome®
Pack Size: 180 caps (vegetarian)
Price: £61.90
Double Zinc Picolinate

A high bioavailability double-strength zinc supplement

  • our best-absorbed zinc supplemen
  • essential for growth and immune function
  • promotes reproductive health
  • without preservatives, magnesium stearate, or other lubricants and diluents

 

 

Pack Size: 60 veg caps, 180 caps (vegetarian)
Price: from £23.52
Betaine HCL & Pepsin

For improved protein digestion

  • enhances stomach acidity
  • promotes protein breakdown and absorption
  • benefits individuals with occasional indigestion
  • made without lactose, preservatives, magnesium stearate, or other lubricants and diluents
Pack Size: 450 Caps, 225 Vegitarian Capsules
Price: from £42.49
5-Hydroxytryptophan 50mg

5-Hydroxytryptophan (5-HTP) is the intermediate metabolite produced when the body initiates the process of converting the essential amino acid L-tryptophan to serotonin. Serotonin levels in the body are associated with the regulation of sleep, mood, aggression, appetite, temperature, sexual behavior, and pain sensation.

Pack Size:
Price: £44.50
Meriva-SR

Curcumin complexed with phosphatidylcholine for superior bioavailability

  • for maintenance of the body's normal inflammatory response
  • provides potent antioxidant and hepatoprotective activity
  • sustained-release formula allows for an optimal curcumin blood level over time
  • significantly increased bioavailability from phytosome preparation
Pack Size:
Price: £55.69
Heavy Metal Support

Part of a comprehensive support system for surviving our toxic world. This product provides necessary nutrients needed for detoxification.

  • essential nutrients for detoxification support
  • use as an adjunct with other detox support products
  • contains important kidney-protective botanicals
  • helps replenish minerals lost from detoxification

 

Pack Size:
Price: £38.99
Basic Nutrients IV

Basic Nutrients IV

Some customers have noted that the multiple vitamin-mineral formulas have a strong odor. This is particularly noticeable to patients who have been taking the multiples long-term. The change in odor is due to the fact that we have (over the past year) changed from selenium picolinate to selenomethionine. While we believe selenomethionine is a superior form of selenium, it does have a bit of a sulfur smell, which is normal and does not reflect a problem with the product.

A comprehensive multiple with copper and iron featuring citrate mineral chelates

  • provides the active forms of folic acid – L-5-methyltetrahydrofolate and folinic acid in a balanced 1:1 ratio
  • provides the active, readily usable forms of vitamins B6 and B2
  • features trace minerals
Pack Size: 180 caps (vegetarian)
Price: £60.29
Extra Nutrients™

Some customers have noted that the multiple vitamin-mineral formulas have a strong odor. This is particularly noticeable to patients who have been taking the multiples long-term. The change in odor is due to the fact that we have (over the past year) changed from selenium picolinate to selenomethionine. While we believe selenomethionine is a superior form of selenium, it does have a bit of a sulfur smell, which is normal and does not reflect a problem with the product.

A multi-vitamin-mineral supplement for individuals needing extra antioxidant support

  • a comprehensive multi with extra antioxidant nutrients
  • provides the active forms of folic acid – L-5-methyltetrahydrofolate and folinic acid in a balanced 1:1 ratio
  • provides the active, readily usable forms of vitamins B6 and B2
  • features trace minerals
Pack Size: 180 caps (vegetarian)
Price: £80.99
Niacinamide

For cellular protection and antioxidant support

  • supports joint and skin health
  • a non-flushing form of vitamin B3
  • Niacinamide is yeast free
  • without preservatives, magnesium stearate, or other lubricants and diluents
  • made without flowing agents that can inhibit bioavailability

 

 

Pack Size: 180 caps (vegetarian)
Price: £30.10
5-MTHF 1mg (L-Methylfolate)

5-MTHF 1 mg

the most biologically active form of folate*

  • a breakthrough in folate supplementation
  • the most bioavailable, active form of folate*
  • an excellent source of folate for pregnant women*
  • supports optimal cardiovascular and nerve function*
Pack Size:
Price: £29.45
Methyl-Guard®

Important homocysteine metabolism cofactors

  • helps maintain good cardiovascular health by supporting normal homocysteine levels
  • contains the active forms of folate and vitamin B12 (5-MTHF and methylcobalamin)
  • helps maintain good cognitive and neurological health
  • supports bone and female reproductive health
Pack Size: 180 caps (vegetarian)
Price: £64.19
Iso-Phos

The primary membrane phospholipid in brain cells

  • helps optimize brain function
  • helps modulate cortisol levels during stress
  • enhances memory and focus
  • from a vegetarian source

 

 

Pack Size: 60 veg caps
Price: £78.59
Basic Nutrients V

A comprehensive multiple without iron and iodine featuring citrate-malate mineral chelates

  • provides the active forms of folic acid – L-5-methyltetrahydrofolate and folinic acid in a balanced 1:1 ratio
  • provides the active, readily usable forms of vitamins B6 and B2
  • features trace minerals
Pack Size: 180 caps (vegetarian)
Price: £63.79
Ferrasorb®

A complete blood-building formula

  • folate, B12, and iron supplement
  • superior blood-building effect
  • provides the active forms of vitamin B12 (adenosylcobalamin and methylcobalamin) and folate (folinic acid and 5-MTHF)
  • includes well-absorbed, non-constipating iron picolinate

 

 

Pack Size:
Price: £29.50
L-Carnitine

Essential for skeletal and cardiac muscle function

  • helps convert fat to energy
  • supports healthy levels of cholesterol and triglycerides
  • promotes healthy sperm count and sperm motility
  • contains no preservatives, magnesium stearate, or other lubricants and diluents

 

 

Pack Size: 60 veg caps
Price: £53.20
Al's Formula

Some customers have noted that the multiple vitamin-mineral formulas have a strong odor. This is particularly noticeable to patients who have been taking the multiples long-term. The change in odor is due to the fact that over the past year, a change from selenium picolinate to selenomethionine has been made. While we believe selenomethionine is a superior form of selenium, it does have a bit of a sulfur smell, which is normal and does not reflect a problem with the product.

a comprehensive vitamin-mineral supplement for men over 40

  • includes saw palmetto, extra zinc, glycine, and glutamic acid for prostate health
  • betaine and hawthorn extract promote cardiovascular function
  • does not contain iron, as iron can be potentially harmful in some older men
  • provides the active forms of folic acid – L-5-methyltetrahydrofolate and folinic acid in a balanced 1:1 ratio
Pack Size:
Price: £83.20
Methyl-Guard Plus®

More concentrated methylation support

  • contains higher amounts of 5-MTHF (active folate), B6, B12
  • riboflavin 5'-phosphate added for extra homocysteine metabolism support
  • easy 3 capsules daily dosing

 

 

Pack Size:
Price: £65.50

Two key components of the structural matrix of joints

  • helps maintain healthy joint function and mobility
  • supports normal cartilage formation
  • glucosamine and chondroitin combination may be of more benefit than glucosamine alone
  • backed by clinical research

 

 

Pack Size:
Price: £45.10
Basic Prenatal

Complete dietary supplement for pregnant and lactating women

  • well-absorbed, highly bioavailable nutrients reduce risk of stomach upset
  • includes iron and bioactive form of folate to help maintain healthy iron and folate levels
  • provides the active forms of folic acid – L-5-methyltetrahydrofolate and folinic acid in a balanced 1:1 ratio
  • contains well-absorbed iron picolinate, which is easy on the stomach and non-constipating
Pack Size:
Price: £37.09
Formula SF722®

Undecylenic acid - potent fatty acid support of healthy gut and vaginal flora

  • Thorne's innovative approach for healthy gut flora
  • six times more effective than caprylic acid
  • maintains healthy vaginal flora
  • one of our best selling products for over 20 years
Pack Size: 250 Gelcaps
Price: £47.40
L-Glutamine

Primary fuel for the cells lining the small intestine

  • promotes gastrointestinal and immune health
  • supports a healthy nervous system
  • a nutrient that is essential for wound healing
  • made without flowing agents that can inhibit its bioavailability

 

 

Pack Size:
Price: £31.90