Optimum and RDA Supplement Levels

Note 1: The optimum levels are calculated by Dr Paul Clayton – the former President of the forum on Food and Health at the Royal Society of Medicine – based on over 35 years of research. His book Health Defence details all the evidence behind his concept of optimum nutrition.

Note 2: His recommended level for supplementation takes into account the average intake from food. So the recommended level is the extra needed to achieve an optimum level.

In some cases normal intake is enough and not much supplementation is needed and/or the RDA is adequate. Some nutrients also have an upper safe limit.

A one a day multivitamin – multi mineral will be based on the levels in the UK/EU RDA column. All the nutrients below the green line are included in NutriShield Premium.

NutrientUK/EU RDA/RNI
RECOMMENDEDNotes
VITAMINS
Vitamin A

800 mcg

2,664 IU

800 mcg

2,664 IU

Immune support
B VITAMINS
B1 Thiamin1.1 mg7.5 mgNeeded
B2 Riboflavin1.4 mg7.5 mgfor
B3 Niacin16 mg16 mgmetabolism
B5 Pantothenic Acid6 mg11.25 mgand
B61.4 mg7.5 mgenergy
B7 Biotin50 mcg150 mcgHeart health
B9 Folic Acid200 mcg200 mcgDNA repair
B122.5 mcg6.75 mcgRed blood cells
Vitamin C80 mg500 mgMany functions
Vitamin D

5 mcg

200 IU

20 mcg

800 IU

as D3 – increase in winter
Vitamin E d-alpha tocopherol equivalent12 mgat least 70 mgNatural d-alpha plus Mixed tocopherols

Vitamin K

75 mcg

75 mcg

K1 and K2
MINERALS AND TRACE MINERALS
Calcium800 mg175 mg as plentiful in most dietsBone health
Chromium
40 mcg120 mcgRegulates blood sugar
Copper
1 mg1 mgEnergy production
Iodine150 mcg100 mcg as plentiful in most dietsThyroid function
Magnesium375 mg110 mg as plentiful in most dietsBone & heart health
Manganese
2 mg2 mgBone health
Selenium
55 mcg150 mcgImmune function
Zinc
10 mg10 mgImmune function
Molybdenum50 mcg40 mcgEnzyme action
Iron14 mg10 mgExtra ONLY for pre-menopausal women
OMEGA 3 FISH OIL
Omega 3
high EPA and DHA
not set600 mgPowerful anti-inflammatory
FLAVONOIDS/POLYPHENOLS
Green Tea Polyphenols EGCG and other catechinsnot set150 mgPowerful anti-oxidant
Grapeseed
procyanidins
not set98 mgPowerful anti-oxidant
Seaweed Ascophyllum Nodosum
marine polyphenols
not set50 mgBoosts omega-3

Black Pepper flavonoids

piperine

not set2.5 mgBoosts curcumin

Bilberry

anthocyanidins

not set2 mgPowerful anti-oxidant
Curcuminoidsnot set250 mgPowerful anti-inflammatory
CAROTENOIDS
Beta & Alpha carotenenot set7 mgImmune function
Luteinnot set6 mgEye health
Lycopenenot set5 mgAnti-cancer
Zeaxanthinnot set40 mcgEye health
Cryptoxanthinnot set40 mcgEye health
SOY ISOFLAVONES
Isoflavones
high Genistein
not set40 mgAnti-cancer
CO-ENZYME Q10
CoQ10not set30 mgHeart health
BETAINE

Betaine

not set450 mgHeart health (methyl group donor)
GLUCOSAMINE
Glucosamine as hydrochloride not sulphatenot set400 mgJoint health but needs vits D & K