Hair health is closely tied to nutritional status, and certain deficiencies such as low iron and low vitamin D are commonly associated with changes in hair condition.
The Hair Strength Bundle combines Vitamin D3 & K2, Marine Collagen Complex, and Iron in a single, convenient package.
Together, they address key nutritional support for hair, skin, and the structural proteins hair is made from.
Vitamin D3 & K2
60 capsules
Provides 100µg (4,000 IU) vitamin D3 and 100µg vitamin K2 MK-7 per daily capsule.
Provides 100µg (4,000 IU) vitamin D3 and 100µg vitamin K2 MK-7 per daily capsule.
-
Immune and bone support -
Vitamin D contributes to normal immune function and helps the body absorb calcium for
bone health. Vitamin K2 supports the maintenance of healthy bones.
-
A common shortfall in the UK
-
Vitamin D deficiency is widespread across the UK, particularly during autumn and winter.
UK health authorities recommend supplementation for most adults during these months.
-
Do not exceed the stated dose. If you are pregnant, breastfeeding, or taking prescription
medication, speak to your GP or pharmacist before use.
Marine Collagen Complex
60 capsules
Hydrolysed marine collagen peptides with vitamin C.
Hydrolysed marine collagen peptides with vitamin C.
-
Vitamin C and collagen formation
-
Vitamin C contributes to collagen formation for the normal function of skin, bones and
cartilage. Collagen is the structural protein in hair follicles and the surrounding
skin. Vitamin C also contributes to immune system function.
-
Structural protein support -
Marine collagen provides hydrolysed type I collagen peptides, the primary structural
protein in skin, hair, and nails. These are hydrolysed for absorption and used as
building blocks for the body's own protein synthesis.
Provides 14.7mg elemental iron as ferrous fumarate, a highly bioavailable ferrous
salt.
Provides 14.7mg elemental iron as ferrous fumarate, a highly bioavailable ferrous salt.
-
Normal haematopoiesis and hair health -
Iron contributes to normal formation of red blood cells and haemoglobin, and supports
immune system function. Iron is also known to contribute to the metabolism of various
nutrients. Iron deficiency is one of the most commonly cited nutritional factors
associated with hair concerns in women, and this supplement is particularly relevant for
women of childbearing age.
-
Addressing a known shortfall -
Low iron status is among the most common nutritional deficiencies in women in the UK.
The non-haem iron in plant foods is absorbed less efficiently than haem iron from meat,
making supplementation particularly relevant for those following plant-based diets.
Iron supports red blood cell formation and oxygen transport, which is relevant for the health of actively growing hair follicles. Vitamin C (in the Marine Collagen Complex) is well established as a compound that supports non-haem iron absorption, and it also contributes to collagen formation. Vitamin D supports immune function and normal nutritional status. Together, these three supplements address key nutritional pillars associated with hair health.
Written and reviewed by our qualified team
Content last updated:
19 May 2026