Turn an interesting idea into a question that can be tested. Identify the intended outcome, find the closest human evidence, and ask whether a measured change would improve a real decision. The linked ingredient records let you follow those questions to individual studies.

A guide to reading research

Key points

When comparing supplements, ask whether a study answered the question that matters to you, rather than relying on an ingredient's popularity. Read unchanged outcomes and safety findings as well as positive results.

KNOWLEDGE RECORD

Category
Reading science
Last Reviewed

Explore 10 papers by research question ↓

Start with the question you want answered #

Biohacking encompasses interests ranging from sleep and exercise to supplement combinations. This guide explains how to read supplement research and organize information for your decisions.

Improving strength, correcting a low nutrient level and reducing long-term disease risk are different questions. Start by avoiding extrapolation from one improved measure to other goals.

Question 1: Were the participants similar to you? #

Results mean different things for healthy young adults, people with deficiencies and patients receiving medication. The ingredient library lists each paper's participants separately. Check disease status and background diet as well as age.

Question 2: What was the primary outcome? #

Separate outcomes specified in advance as central to the study from secondary or exploratory measures. For example, a selected urolithin A RCT reported improvements in some muscle endurance measures, but no significant differences in the primary six-minute walk and ATP production outcomes.[2]

Reading the primary outcome before the conclusion helps you avoid relying solely on a paper's title or advertising.

Question 3: Was it the same ingredient, formulation and dose? #

Treat foods, isolated compounds, standardized extracts and finished multi-ingredient products separately. Similar names can mislead: ALA (alpha-linolenic acid) is not 5-ALA (5-aminolevulinic acid).

Doses in each Study Record describe the conditions needed to understand the trial. They are not instructions for choosing your own intake.

Question 4: How large and how uncertain was the result? #

Read effect sizes, confidence intervals and practical relevance, not only statistical significance. A non-significant result in a small trial may be insufficient to establish that there is no effect.

Interpretation of a meta-analysis depends on how it handles differences in study populations and interventions.

Question 5: Have you checked safety and interests? #

Supplements can interact with medicines or other supplements. Do not use them to replace treatment or delay medical care. Tell your doctor or pharmacist which products you use.[1]

Corporate funding alone does not invalidate a result. Check who participated in the design and analysis and whether independent studies reproduced the findings. An unverified COI field does not mean “no conflicts of interest.”

What We Can Learn / Starting a comparison #

Choose one ingredient and first read the population, outcomes and findings. Then check limitations, funding and COI, following the DOI or PubMed link when needed. Do not predict the effects of a combination by adding together single-ingredient findings.

What Remains Unknown / Limits of this guide #

This guide and the ingredient library organize selected sources. They do not rank all ingredients, prescribe individual doses or establish the long-term safety of combinations.

LITERATURE MAP / 10 PAPERS

Compare papers by conditions and findings.

A literature map exploring this topic from different angles. It includes observational studies, research frameworks and methodology as well as intervention trials, with the study type indicated.

Selected: 2026-09-21. Bibliographic information checked against Europe PMC / PubMed. Editorial selection considered major papers and a range of populations and questions. This is not a systematic search covering all recent research.

10 RECORDS

A dash marks fields outside the bibliographic record. Use detailed records to compare findings and design records to connect mechanisms.

Research comparison table
Paper and topicStudy conditionsFindings and scope
Effect of personalized nutrition on health-related behaviour change: evidence from the Food4Me European randomized controlled trial.2017 International journal of epidemiologyPMID 27524815 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Celis-Morales C, Livingstone KM, Marsaux CF, Macready AL, Fallaize R, O'Donovan CB et al.

Effects of Time-Restricted Eating on Weight Loss and Other Metabolic Parameters in Women and Men With Overweight and Obesity: The TREAT Randomized Clinical Trial.2020 JAMA internal medicinePMID 32986097 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Lowe DA, Wu N, Rohdin-Bibby L, Moore AH, Kelly N, Liu YE et al.

A 2-Year Randomized Controlled Trial of Human Caloric Restriction: Feasibility and Effects on Predictors of Health Span and Longevity.2015 The journals of gerontology. Series A, Biological sciences and medical sciencesPMID 26187233 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Ravussin E, Redman LM, Rochon J, Das SK, Fontana L, Kraus WE et al.

Effect of long-term caloric restriction on DNA methylation measures of biological aging in healthy adults from the CALERIE trial.2023 Nature agingPMID 37118425 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Waziry R, Ryan CP, Corcoran DL, Huffman KM, Kobor MS, Kothari M et al.

Randomized controlled trial for time-restricted eating in healthy volunteers without obesity.2022 Nature communicationsPMID 35194047 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Xie Z, Sun Y, Ye Y, Hu D, Zhang H, He Z et al.

Feasibility of time-restricted eating and impacts on cardiometabolic health in 24-h shift workers: The Healthy Heroes randomized control trial.2022 Cell metabolismPMID 36198291 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Manoogian ENC, Zadourian A, Lo HC, Gutierrez NR, Shoghi A, Rosander A et al.

Effects of a personalized nutrition program on cardiometabolic health: a randomized controlled trial.2024 Nature medicinePMID 38714898 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Bermingham KM, Linenberg I, Polidori L, Asnicar F, Arrè A, Wolf J et al.

Effect of Two-Year Caloric Restriction on Bone Metabolism and Bone Mineral Density in Non-Obese Younger Adults: A Randomized Clinical Trial.2016 Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral ResearchPMID 26332798 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Villareal DT, Fontana L, Das SK, Redman L, Smith SR, Saltzman E et al.

Effect of Continuous Glucose Monitoring on Glycemic Control in Patients With Type 2 Diabetes Treated With Basal Insulin: A Randomized Clinical Trial.2021 JAMAPMID 34077499 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Martens T, Beck RW, Bailey R, Ruedy KJ, Calhoun P, Peters AL et al.

A randomized trial of genetic information for personalized nutrition.2012 Genes & nutritionPMID 22407352 #Study conditions

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Findings and scope

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Open original paper

DOI

Authors

Nielsen DE, El-Sohemy A

The literature map is an index of research questions and references. Individual assessment of results, doses, funding and COI is limited to the detailed study records. Related reports from the same trial may be included; paper counts are not counts of independent trials.

Cite this page

LÍFSVARÐA. Biohacking and supplements: five questions for evaluating the evidence Version 3.1 / Updated 2026-10-24

https://lifsvarda.com/knowledge/biohacking-evidence/

Edited by LÍFSVARÐA (product brand).Editorial policy

Sources and updates

  1. NCCIH — Using Dietary Supplements WiselyPublic-facing safety information from an official agency checked. US regulatory explanations should not be treated as equivalent to Japanese rules.
  2. Liu et al. (2022) — Randomized controlled trial of urolithin AThe primary study abstract was checked. Details are recorded in the UA Study Record.

First published: 2026-09-21 / Version 3.1. Updated 2026-09-23: Added a research comparison table and links to design records. Source notes identify the scope of verification when the full paper has not been reviewed. Research summaries and LÍFSVARÐA’s interpretation are distinguished.