Why Nutrient Absorption Varies for Everyone
Every person’s nutritional needs are different. The way the body absorbs, transports, and uses vitamins and minerals can vary based on factors such as genetics, age, dietary patterns, overall nutritional status, and other individual characteristics.
Scientific research on nutrient bioavailability shows that the amount of a nutrient consumed is not necessarily the same as the amount the body ultimately absorbs and uses. Bioavailability can vary among nutrients and among individuals, which is one reason nutritional needs are not always identical from person to person.¹
Genetics may also contribute to these differences. Research in nutrigenetics has identified genetic variants associated with differences in vitamin metabolism, transport, and nutritional status, including vitamins D, E, C, B12, and folate.²˒³
Age can be another consideration. For example, the National Institute on Aging notes that some older adults have difficulty absorbing vitamin B12 naturally found in food and may be advised by a healthcare professional to obtain it from fortified foods or supplements.⁴
For these reasons, dietary supplements should not be viewed as a one-size-fits-all solution. Some people may be able to meet their nutritional needs through a varied diet, while others may benefit from supplementation when recommended based on their individual dietary or nutritional needs.⁴
Why Consider a 90-Day Regimen?
When incorporating a dietary supplement into a wellness routine, consistency can be useful. A 90-day regimen provides a practical period for establishing a consistent routine and assessing how a supplement fits into your overall nutrition and wellness plan.
Importantly, 90 days should not be interpreted as a clinically established timeframe for treating tinnitus or any other medical condition. Individual experiences with dietary supplements vary, and supplements are not a substitute for appropriate medical evaluation or treatment.
1. Nutritional Status Can Take Time to Assess
Nutrient status is influenced by dietary intake, absorption, metabolism, and individual biological differences.¹˒² Rather than expecting an immediate result from a dietary supplement, consistent use as directed can provide a more standardized period for evaluating how it fits within your broader nutritional routine.
2. Individual Responses Can Vary
There is no universal response to dietary supplementation. Genetic differences, dietary habits, age, existing nutrient status, and other individual factors may influence how nutrients are processed and utilized.²˒³
This variability is one reason the experience of one individual should not be considered predictive of another person’s results.
3. Consistency Supports a Reliable Routine
Taking a supplement consistently according to its labeled directions can make it easier to evaluate your nutritional routine without frequent changes in intake. A 90-day period offers a practical framework for maintaining that consistency.
However, longer use does not necessarily mean greater benefit, and taking more than the recommended amount is not advisable unless directed by a qualified healthcare professional. The National Institute on Aging notes that excessive amounts of some vitamins and minerals can be harmful.⁴
4. Ninety Days Provides a Practical Evaluation Period
A 90-day regimen can serve as a practical evaluation period, rather than a guaranteed timeframe for results. At the end of that period, you can consider factors such as consistency, tolerability, dietary habits, and whether continued supplementation is appropriate for your individual needs.
If you are experiencing tinnitus or persistent ringing in the ears, dietary supplementation should not replace evaluation by an appropriate healthcare professional. Clinical guidance for tinnitus emphasizes proper evaluation and evidence-based management based on the individual’s symptoms and circumstances.⁵
Before Taking a Dietary Supplement
Before starting any dietary supplement, consider speaking with your physician, pharmacist, registered dietitian, or other qualified healthcare professional—particularly if you take prescription or over-the-counter medications, are pregnant or nursing, have an underlying medical condition, or are considering combining multiple supplements.
Dietary supplements can interact with medications, and individual nutritional requirements can vary.⁴
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
References
1. Hambidge KM. Micronutrient bioavailability: Dietary Reference Intakes and a future perspective. American Journal of Clinical Nutrition. 2010;91(5):1430S–1432S. PMID: 20200261.
PubMed: Micronutrient Bioavailability
2. Mithen R. Effect of genotype on micronutrient absorption and metabolism: a review of iron, copper, iodine and selenium, and folates. International Journal for Vitamin and Nutrition Research. 2007;77(3):205–216. PMID: 18214022.
PubMed: Effect of Genotype on Micronutrient Absorption and Metabolism
3. Niforou A, Konstantinidou V, Naska A. Genetic Variants Shaping Inter-individual Differences in Response to Dietary Intakes—A Narrative Review of the Case of Vitamins. Frontiers in Nutrition. 2020;7:558598. PMID: 33335908.
PubMed: Genetic Variants and Individual Responses to Dietary Intake
4. National Institute on Aging, National Institutes of Health. Dietary Supplements for Older Adults.
NIH/NIA: Dietary Supplements for Older Adults
5. Tunkel DE, Bauer CA, Sun GH, et al. Clinical Practice Guideline: Tinnitus. Otolaryngology–Head and Neck Surgery. 2014;151(2 Suppl):S1–S40. PMID: 25273878.
PubMed: Clinical Practice Guideline — Tinnitus
Regulatory Information
U.S. Food and Drug Administration. Structure/Function Claims.
FDA: Structure/Function Claims
U.S. Food and Drug Administration. Questions and Answers on Dietary Supplements.
FDA: Questions and Answers on Dietary Supplements