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TSA TEKK Iron Bisglycinate + Vitamin C: A Practical Guide to Iron, Ferritin, Testing and When Supplementation Actually Helps
We launched TSA TEKK Iron Bisglycinate + Vitamin C yesterday. Each capsule delivers 19 mg elemental iron from ferrous bisglycinate plus 80 mg vitamin C (60 capsules per bottle).
Iron deficiency is one of the most common nutritional deficiencies worldwide, including in India. But not everyone needs an iron supplement. You can have iron deficiency without anaemia. You can have anaemia without iron deficiency.
The goal is not more iron. The goal is adequate iron stores for the right reasons, confirmed by testing where appropriate, and supported by diet first.
Why Ferrous Bisglycinate and Vitamin C?
Ferrous bisglycinate is iron bound to two molecules of the amino acid glycine. It is a fully chelated form that remains more stable through the digestive tract than many conventional iron salts. Clinical data (including a 2023 systematic review and meta-analysis in Nutrition Reviews) show it can support iron status with fewer gastrointestinal side effects than several iron salts in some populations.
Vitamin C improves the absorption of non-heme iron by helping keep it in a more soluble, absorbable state and reducing the impact of inhibitors. Pairing the two is a practical, evidence-aligned combination for people who need additional dietary iron.
How Common Is Anaemia in India?
According to India’s NFHS-5 survey (2019–2021), anaemia affected approximately:
57% of women aged 15–49
25% of men aged 15–49
52.2% of pregnant women
67.1% of children aged 6–59 months
These are anaemia figures, not confirmed iron-deficiency figures. Iron deficiency is a major cause of anaemia, but vitamin B12 deficiency, folate deficiency, inherited blood disorders, inflammation, and other conditions can also produce it. Test and identify the cause rather than assume every case of anaemia requires iron.
Ferritin: The 2026 Update That Matters
Ferritin reflects how much iron your body has stored. Haemoglobin reflects iron currently being used to help carry oxygen. You can have normal haemoglobin and still have low iron stores.
In 2026 the American Society of Hematology (ASH) updated its guidelines for identifying iron deficiency in adults (Powers et al., Blood Advances, 2026). Key shifts:
Earlier common threshold: ferritin ≤15 ng/mL indicated iron deficiency.
New guidance: ferritin ≤30 ng/mL indicates iron deficiency in most adults (including menstruating and pregnant individuals).
In certain people with symptoms or ongoing risk factors: a threshold of ≤50 ng/mL may be appropriate.
For adults with inflammation, higher thresholds or additional markers (such as transferrin saturation) are considered.
Someone with ferritin of 20–25 ng/mL might previously have been told their stores were “normal.” Under the updated guidance they may now be identified as iron deficient. This does not mean everyone’s target has doubled or that everyone needs supplements. Ferritin can also rise with inflammation, so clinicians often interpret it alongside other tests. Normal haemoglobin does not always mean adequate iron stores. Ferritin testing helps catch deficiency before anaemia develops.
Why Adequate Iron Levels Matter
Iron supports:
Oxygen transport
Normal cellular energy production
Muscle oxygen use and storage
Brain function, attention and cognition
Exercise capacity and endurance
Immune cell development and function
Low iron stores may contribute to fatigue, reduced exercise tolerance, poorer concentration, and hair shedding in some individuals when iron is a contributing factor. Correcting a true deficiency can help address these. Taking extra iron when stores are already adequate does not provide additional benefits and may be harmful. The goal is adequate levels, not higher levels.
Who May Benefit From Iron Supplementation?
People more likely to have low iron stores include those with:
Confirmed low ferritin or iron-deficiency anaemia
Heavy menstrual bleeding (regular blood loss depletes stores)
Pregnancy (requirements rise)
Frequent blood donation
Vegetarian or vegan diets (plant-based iron is generally harder to absorb; track intake)
Higher training loads with inadequate iron intake (especially some endurance athletes)
Conditions that impair iron absorption or cause gastrointestinal blood loss
Practical sequence: first assess diet and iron intake, improve food choices where possible, and check haemoglobin plus ferritin if you are in a higher-risk group. Being in one of these groups does not automatically mean you need supplements. Test when appropriate and base decisions on individual results and medical advice.
Who May Not Need Extra Iron?
People with normal iron markers (haemoglobin, ferritin and related tests)
People meeting iron needs from food
Non-vegetarians (meat provides more readily absorbed iron, but eating meat does not guarantee normal stores)
People with thalassaemia (low haemoglobin does not always equal iron deficiency; iron only if deficiency is confirmed and recommended)
People with iron overload conditions such as haemochromatosis (extra iron can be harmful)
Practical Notes on Frequency, Dose and Timing
Each TSA TEKK capsule provides 19 mg elemental iron + 80 mg vitamin C.
For vegetarians and vegans: plant-based iron is generally harder to absorb. Include dal, rajma, tofu, seeds and other iron-rich foods, and pair with vitamin C sources (lemon, amla, guava). If dietary intake is insufficient, supplementation may help meet needs.
Intermittent supplementation has research support in certain higher-risk groups. WHO guidance for menstruating women in populations where anaemia prevalence is ≥20% includes a weekly preventive approach (higher elemental iron plus folic acid). 19 mg taken 2–3 times weekly is not an established preventive regimen; the right frequency depends on diet, iron levels and individual requirements.
Already iron deficient? Treatment doses are often higher and should be guided by blood tests and a clinician. Normal levels plus adequate dietary intake generally mean additional iron is unnecessary.
Timing tips: preferably on an empty stomach for better absorption, or with food if it causes discomfort. Keep at least 60 minutes between iron and tea, coffee or milk. Separate from calcium supplements. Check for interactions with medications.
Low iron is not always caused by poor diet. Unexplained iron-deficiency anaemia, particularly in adult men and postmenopausal women, requires medical evaluation.
The Bottom Line
We launched TSA TEKK Iron Bisglycinate + Vitamin C to provide a convenient, well-tolerated option for people who need additional dietary iron after appropriate assessment.
Check your levels. Understand why they are low (or whether they are low at all). Improve diet first where possible. Supplement when needed. Monitor progress.
The goal is not to take more supplements. It is to take what your body needs, for the right reason.
Disclaimer: This is general educational information, not medical advice. Iron needs and treatment doses vary. Consult a healthcare professional before treating iron deficiency, especially during pregnancy or if you have anaemia, thalassaemia or iron overload conditions.
Selected References
Powers JM, et al. American Society of Hematology 2026 guidelines for diagnosis of iron deficiency. Blood Advances. 2026.
World Health Organization. Guidelines on ferritin and iron status. 2020.
Ministry of Health and Family Welfare, Government of India. NFHS-5 (2019–2021) anaemia prevalence data.
Kulkarni B, et al. Iron deficiency in Indian children and adolescents. Journal of Nutrition. 2021.
Systematic review and meta-analysis of ferrous bisglycinate. Nutrition Reviews. 2023.
Li N, et al. Is vitamin C necessary with oral iron? JAMA Network Open. 2020.
American Gastroenterological Association. Management of iron deficiency anaemia. 2024.
Stoffel NU, et al. Daily versus alternate-day iron supplementation. Lancet Haematology. 2017.
Snook J, et al. British Society of Gastroenterology guidelines for iron deficiency anaemia. Gut. 2021.
NIH Office of Dietary Supplements. Iron — dietary sources, absorption and requirements.
