THE JOURNAL / 25 Sep 2026
Ingredient Research: Browse the ALL TOLD Evidence Library
Here is what we know. Here is what the evidence suggests. Here is what has not been established. Browse the ingredients, compare the research and check the limits before interpr...
Here is what we know. Here is what the evidence suggests. Here is what has not been established. Browse the ingredients, compare the research and check the limits before interpreting a supplement claim.
Evidence reviewed: 25 September 2026. Categories organise research questions; they do not promise that an ingredient or product delivers a particular health outcome.
Browse by category
Performance · Focus · Sleep · Gut · Skin · Daily
Performance
Exercise studies: distinguish acute test results, training adaptations and practical tolerability.
- Beetroot nitrate
- Beta-alanine
- Caffeine
- Citrulline and citrulline malate
- Collagen peptides
- Creatine monohydrate
- Electrolytes
- HMB
- Plant protein
- Potassium
- Rhodiola rosea
- Sodium
- Sodium bicarbonate
- Tart cherry
- Taurine
- Whey protein
Focus
Attention and memory studies: look for the age group, task, duration and the contribution of caffeine.
- Bacopa monnieri
- Caffeine
- Citicoline
- Ginkgo biloba
- L-theanine
- L-tyrosine
- Panax ginseng
- Rhodiola rosea
- Vitamin B12
- Vitamin B6
Sleep
Sleep research: distinguish subjective quality, measured sleep and treatment of a diagnosed sleep disorder.
- Chamomile extract
- Glycine
- L-theanine
- L-tryptophan
- Magnesium and magnesium glycinate
- Tart cherry
- Valerian root
- Vitamin B6
Gut
Fibre, microbes and enzymes: the exact preparation, strain or substrate can determine relevance.
- Digestive enzymes
- Ginger extract
- Inulin (chicory-root fibre)
- Lactase enzyme
- Partially hydrolysed guar gum (PHGG)
- Peppermint oil
- Probiotics
- Psyllium husk
- Saccharomyces boulardii
Skin
Oral skin research: separate it from topical studies, laboratory antioxidant tests and product advertising.
- Astaxanthin
- Biotin (vitamin B7)
- Ceramides
- Collagen peptides
- Grape seed procyanidins
- Hyaluronic acid
- Vitamin C
- Zinc
Daily
Nutritional adequacy: a normal biological role does not mean extra supplementation helps when intake is sufficient.
- Biotin (vitamin B7)
- Calcium
- Folic acid and folate
- Iodine
- Iron
- Magnesium and magnesium glycinate
- Omega-3: EPA and DHA
- Plant protein
- Potassium
- Selenium
- Sodium
- Vitamin B12
- Vitamin B6
- Vitamin C
- Vitamin D3
- Zinc
All ingredients A–Z
One main evidence page per ingredient or coherent ingredient family. Alternative names and product forms are included on the same page where separate pages would repeat the evidence.
A · B · C · D · E · F · G · H · I · L · M · O · P · R · S · T · V · W · Z
A
- Astaxanthin — Skin
B
- Bacopa monnieri — Focus
- Beetroot nitrate — Performance
- Beta-alanine — Performance
- Biotin (vitamin B7) — Skin, Daily
C
- Caffeine — Focus, Performance
- Calcium — Daily
- Ceramides — Skin
- Chamomile extract — Sleep
- Citicoline — Focus
- Citrulline and citrulline malate — Performance
- Collagen peptides — Skin, Performance
- Creatine monohydrate — Performance
D
- Digestive enzymes — Gut
E
- Electrolytes — Performance
F
- Folic acid and folate — Daily
G
- Ginger extract — Gut
- Ginkgo biloba — Focus
- Glycine — Sleep
- Grape seed procyanidins — Skin
H
- HMB — Performance
- Hyaluronic acid — Skin
I
- Inulin (chicory-root fibre) — Gut
- Iodine — Daily
- Iron — Daily
L
- L-theanine — Focus, Sleep
- L-tryptophan — Sleep
- L-tyrosine — Focus
- Lactase enzyme — Gut
M
- Magnesium and magnesium glycinate — Daily, Sleep
O
- Omega-3: EPA and DHA — Daily
P
- Panax ginseng — Focus
- Partially hydrolysed guar gum (PHGG) — Gut
- Peppermint oil — Gut
- Plant protein — Performance, Daily
- Potassium — Daily, Performance
- Probiotics — Gut
- Psyllium husk — Gut
R
- Rhodiola rosea — Focus, Performance
S
- Saccharomyces boulardii — Gut
- Selenium — Daily
- Sodium — Performance, Daily
- Sodium bicarbonate — Performance
T
- Tart cherry — Sleep, Performance
- Taurine — Performance
V
- Valerian root — Sleep
- Vitamin B12 — Daily, Focus
- Vitamin B6 — Daily, Focus, Sleep
- Vitamin C — Daily, Skin
- Vitamin D3 — Daily
W
- Whey protein — Performance
Z
- Zinc — Daily, Skin
Find ingredient research from a formula
These links use the current displayed formula tables. They identify related research, not proof of a finished formula’s effectiveness. Study forms may differ: the magnesium page distinguishes mineral forms, and the citrulline page distinguishes L-citrulline from citrulline malate. Always check the final label.
Strength Mix
The stored description also mentions Taurine, but the displayed formula table does not. Its research page is retained provisionally; confirm the final label before treating it as a current constituent.
Focus Mix
Contains caffeine. Include all other caffeine sources when reviewing daily intake.
Sleep Mix
Gut Mix
Skin Mix
Daily Mix
Vegan Essentials
Selenium is mentioned in the stored description but not the displayed formula table. Confirm the final label before treating it as a constituent.
Caffeine + L-Theanine
Pre-Workout
Zinc + Magnesium
Electrolytes
Prebiotic Fibre
How to read the evidence
Match the question
Check who took part, what preparation they received, the dose, the duration and the comparison group. A trial in people with a diagnosed deficiency does not establish extra benefit in people with adequate intake. A trial of a medicine does not establish a treatment claim for a food supplement.
Separate mechanism from outcome
A laboratory pathway, a blood-marker change and a noticeable benefit are different things. We prioritise controlled human studies and systematic reviews, and identify small samples, inconsistent results, funding concerns and missing replication.
Read the negative findings
A statistically positive result may be small or uncertain. A review can contain a favourable average while its higher-quality studies find no clear effect. Each ingredient page includes what has not been established, alongside any supportive findings.
Keep study doses in context
Research quantities describe methods, not personal instructions. Read safety and interaction sections, check the final product label and seek individual advice where medicines, pregnancy or a medical condition make that necessary.
What this library covers
The index covers identifiable active ingredients and ingredient families in the active ALL TOLD catalogue, including constituents found only in mixes. Prebiotic Fibre and PHGG share a page. Combination products link to their constituent pages instead of duplicating the ingredient evidence.
Some catalogue entries do not disclose full probiotic strain identities, plant-protein sources, enzyme identities and activity units, or all excipients. Those details cannot be inferred from a generic product name. The relevant articles explain what is needed to match a product to a study.
Editorial and claims standard
This library is on a commercial website. Scientific citations and an educational disclaimer do not exempt food marketing from Great Britain’s nutrition and health-claims rules. A research finding is not automatically an authorised claim, and an ingredient trial is not evidence that an ALL TOLD product treats or prevents disease. Product-specific claims require the applicable authorised wording, conditions of use and verified final formulation.