Zinc

Q: Why does Singular use bisglycinate rather than picolinate or citrate?

Picolinate and citrate are well-absorbed organic forms. Bisglycinate stands out through its absorption via dipeptide transporters, independent of standard mineral transporters. This feature reduces competition with other minerals in the formula (copper, iron) and explains its integration in a multi-bioactive formula.

Q: Can zinc be taken continuously or should breaks be taken?

At the nutritional dosages in the Singular formula (10 to 15 mg), continuous daily intake is appropriate. Zinc does not accumulate significantly in the body, making regular intake relevant. Periodic biological monitoring helps verify that status remains within the optimal range.

Q: Does zinc interact with the other bioactives in the formula?

The Singular formula is designed to minimize negative interactions. Copper and zinc are dosed in a ratio that preserves their mutual absorption. The bisglycinate form uses an absorption pathway distinct from ionic minerals, reducing competition with iron also present in the formula.

Q: When is the best time of day to take zinc for optimal absorption?

Zinc bisglycinate can be taken at any time, including with meals. Its chelated form protects it from interactions with phytates and dietary fibre that reduce absorption of inorganic forms. Taking it with a meal is preferred for optimal digestive tolerance.

Q: How can I tell if my zinc intake is sufficient?

Zinc status can be assessed through serum or plasma measurement as part of a nutritional panel. Nail and skin quality and the frequency of seasonal infections are observable indicators. A healthcare professional can interpret these markers and adjust nutritional recommendations.

Zn · Bisglycinate de zinc · Zinc bisglycinate · Zinc chélaté

MineralsGenomic stability

With age, tissue zinc concentrations decline steadily, compounded by less efficient intestinal absorption. This drop parallels weakening immune defenses and slower cellular repair. Maintaining optimal zinc status is a recognized lever of biological preservation in aging nutrition research.

Last updated: March 24, 2026

Mechanism of Action

Zinc operates at three distinct biological levels. At the enzymatic level, it binds to the active site or structural framework of key metabolic proteins. This binding stabilizes the enzyme's three-dimensional shape and enables catalysis. At the immune level, zinc governs the maturation of T lymphocytes in the thymus (the gland that programs adaptive immune responses). A steady intake supports thymic function against the gland's natural involution with age. At the genomic level, zinc stabilizes regulatory proteins that control gene expression. It also supports the fidelity of DNA replication during each cell division.

Key Benefits

Strong
Zinc contributes to normal immune system function, a role supported by data on T lymphocyte maturation and confirmed by multiple controlled trials in adults.
Strong
Zinc contributes to the protection of cells from oxidative stress. Clinical trials show a reduction in lipid peroxidation markers in supplemented subjects.
Strong
Zinc contributes to normal DNA synthesis and has a role in the process of cell division, two functions essential to tissue renewal.
Moderate
Zinc contributes to the maintenance of normal skin. Controlled trials document improved wound healing and skin resilience in subjects receiving optimized intake.
Moderate
Zinc contributes to normal cognitive function. Large cohort studies associate adequate zinc status with better cognitive performance in aging adults.
Moderate
Zinc contributes to the maintenance of normal blood testosterone levels. Observational and interventional data confirm the link between zinc status and hormone levels.
Moderate
Zinc contributes to the maintenance of normal bones. Epidemiological studies show a positive association between zinc intake and bone mineral density.

Dosage & Forms

Several zinc forms exist on the market. Zinc oxide, the most widespread, has limited bioavailability (about 50% that of sulfate). Zinc sulfate offers decent absorption but frequently causes digestive discomfort. Gluconate and citrate fall in an intermediate range. Picolinate shows good absorption in some comparative studies. Bisglycinate, the form selected by Singular, surpasses these alternatives in both absorption and digestive tolerance. The formula delivers 10 to 15 mg per serving, calibrated to each individual's nutritional profile. The European nutrient reference value is set at 10 mg per day.

In the Singular Formula

Inclusion rationale

Zinc contributes to the normal functioning of the immune system, to normal DNA synthesis, to the protection of cells against oxidative stress, to the maintenance of normal vision, normal skin and normal bones. The second most abundant trace element in the body after iron, zinc has no significant storage reserve, making a regular daily intake essential. Structurally involved in over 300 enzymes and approximately 10% of all human proteins, zinc is ubiquitous in cellular biochemistry. 'Zinc fingers' are structural protein motifs that allow hundreds of transcription factors to bind to DNA and regulate gene expression. Zinc is also a structural component of copper-zinc superoxide dismutase (Cu/Zn-SOD), one of the first lines of enzymatic antioxidant defense in the body. This enzyme works in tandem with copper (also present in the formula in bisglycinate form), both minerals being necessary for its catalytic activity. A zinc-copper-iron balance is maintained in the formula to optimize absorption without excessive competition between these minerals. The bisglycinate form selected offers optimal absorption through dipeptide transport.

Selected form

Zinc bisglycinate: each zinc atom is chelated (bonded) to two glycine molecules, the smallest amino acid naturally present in the body. This chelation forms a complex stable at gastric pH, which uses amino acid absorption pathways in the intestine. Result: superior bioavailability compared to classic inorganic forms (oxide, sulphate) and optimal digestive tolerance. Zinc contributes to normal immune system function and to the protection of cells from oxidative stress. Quality: vegan, non-GMO, no excipient, Halal and Kosher certified.

Formula dosage

0 to 15 mg.

Synergies in the formula

Zinc forms a structural duo with copper within Cu/Zn superoxide dismutase (Cu/Zn-SOD), a key antioxidant defense enzyme. Both minerals are present in the formula as bisglycinate, and their ratio is calibrated to avoid absorption competition. Selenium complements this antioxidant network through a distinct enzymatic pathway (glutathione peroxidases), providing complementary coverage. Vitamin C supports immune function through a pathway parallel to zinc, reinforcing both innate and adaptive responses. Vitamin D3 modulates immunity at a different level, regulating the expression of antimicrobial peptides. Vitamin B6 (P5P) is a cofactor in numerous amino acid metabolism reactions. It works in complementarity with zinc in protein synthesis pathways.

Linked Biomarkers

Zinc Copper/Zinc Ratio Copper

Safety & Precautions

Zinc is well tolerated at nutritional dosages. The European tolerable upper intake level is set at 25 mg per day for adults. Prolonged intake above this threshold may reduce copper absorption, underscoring the importance of balancing these two minerals. Zinc is not recommended at the same time as certain antibiotics (quinolones, tetracyclines), which form insoluble complexes with zinc. A gap of at least two hours between doses is advised. During pregnancy or breastfeeding, professional guidance is recommended before supplementation.

Scientific Studies

Authors	Year	Type	Journal
Science M et al.	2012	Meta-analysis	CMAJ	View on PubMed
Zinc for the treatment of the common cold: a systematic review and meta-analysis of randomized controlled trials Meta-analysis of 17 controlled trials showing that zinc supplementation reduces the duration and severity of the common cold in adults.
Prasad AS et al.	2007	Randomised Controlled Trial	American Journal of Clinical Nutrition	View on PubMed
Zinc supplementation decreases incidence of infections in the elderly: effect of zinc on generation of cytokines and oxidative stress Randomized controlled trial in 50 elderly subjects showing that 45 mg of zinc daily reduces infection incidence and oxidative stress markers.
Wessels I, Maywald M, Rink L	2017	Systematic Review	Nutrients	View on PubMed
Zinc as a Gatekeeper of Immune Function Comprehensive review of zinc's role in innate and adaptive immunity, detailing cellular mechanisms of zinc-dependent signaling.
Prasad AS	2014	Systematic Review	Journal of Trace Elements in Medicine and Biology	View on PubMed
Zinc: an antioxidant and anti-inflammatory agent: role of zinc in degenerative disorders of aging Review of zinc's antioxidant properties and its involvement in maintaining biological functions during aging.
Haase H, Rink L	2009	Systematic Review	Immunity & Ageing	View on PubMed
The immune system and the impact of zinc during aging Review synthesizing data on the decline of zinc status with age and its consequences on immunosenescence.

Frequently Asked Questions

Why does Singular use bisglycinate rather than picolinate or citrate?#[ + ]

Can zinc be taken continuously or should breaks be taken?#[ + ]

Does zinc interact with the other bioactives in the formula?#[ + ]

When is the best time of day to take zinc for optimal absorption?#[ + ]

How can I tell if my zinc intake is sufficient?#[ + ]

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