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Item Number: 1981

H4 Biopterin Factors pack of 60 capsules *


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  • All our capsules come in a ‘postal pack’ container, designed to fit through any standard letterbox
  • Manufactured here in the UK to GMP standards in an ISO 9001:2015 accredited facility
  • Suitable for vegans
  • * FDA compliant


Ingredient Amount per serving ECRDA* %DV*
D-Aspartic acid 70 mg
L-Glutamine 70 mg
L-Glycine 70 mg
Magnesium (from Magnesium citrate) 10 mg 3%* 2%*
Zinc (from Zinc citrate) 7.2 mg 72%* 48%*
Vitamin B6 (from Pyridoxal 5’-Phosphate) 5 mg 357%* 250%*
Adenosine triphosphate 3 mg
Manganese (from Manganese citrate) 1 mg 50%* 50%*
Niacin (as NADH) 1 mg 6%* 5%*
Folic acid (as 5-Methyltetrahydrofolate) 500 mcg 250%* 125%*

† Percent Daily Reference Intakes (RI) not established.

* Percent Daily Reference Intakes (RI) are based on a 2,000 calorie diet.

INGREDIENTS: D-Aspartic acid, L-Glutamine, L-Glycine, Magnesium citrate, Vegetable capsule (Hydroxypropyl methylcellulose), Zinc citrate, Pyridoxal 5’-Phosphate, Manganese citrate, Adenosine triphosphate, Nicotinamide adenine dinucleotide reduced, L-5-Methyltetrahydrofolate calcium salt.

Suitable for vegans