Protocol·Skin & Hair·Intermediate·Reviewed June 9, 2026
Hair Growth & Thickness Protocol.
A supportive stack that pairs structural protein and mineral cofactors for the follicle with optional androgen modulation for androgenetic patterns. Evidence for hair regrowth from supplements is modest, so set realistic expectations and correct any underlying deficiency first.
The hair growth & thickness protocol in brief.
A quick summary. The full stack, with dose and timing for each supplement, is below.
The Hair Growth & Thickness Protocol is an intermediate stack of 7 supplements aimed at skin & hair: Collagen Peptides, Vitamin B7, Zinc, Iron, Vitamin D3, Saw Palmetto, and Silicon. 2 are core and the rest are optional add-ons, at roughly $35-55/mo. Each supplement below lists its dose, timing, role, and the evidence behind it.
What is in the hair growth & thickness protocol.
Dose, timing, role, and evidence tier for each supplement. Core items carry the protocol; optional ones are situational. Open any name for the full profile.
| Supplement | Dose | Timing | Role | Evidence |
|---|---|---|---|---|
| Collagen Peptides | 10-15 g hydrolyzed | Once daily, any time, mixed into a drink | Core | Emerging |
| Vitamin B7 | 1000 mcg (1 mg) | Once daily with breakfast | Optional | Emerging |
| Zinc | 15-25 mg elemental | Once daily with food, separated from Iron by about 2 hours | Core | Moderate |
| Iron | 18-25 mg elemental, only if ferritin is low | Once daily on an empty stomach or with vitamin C, away from Zinc and coffee | Optional | Moderate |
| Vitamin D3 | 1000-2000 IU | Once daily with a meal containing fat | Optional | Emerging |
| Saw Palmetto | 160-320 mg standardized extract | Once or twice daily with food | Optional | Emerging |
| Silicon | 10-20 mg (as orthosilicic acid or choline-stabilized form) | Once daily with food | Optional | Emerging |
Hydrolyzed collagen supplies proline, glycine, and other amino acids that the dermal matrix surrounding the follicle draws on; benefits for hair shaft quality are plausible but not well established and overlap with general protein adequacy.
Vitamin B7 (biotin) is a cofactor for carboxylase enzymes involved in fatty acid and amino acid metabolism that support keratin production; supplementation clearly helps only when a genuine deficiency exists, and most people with adequate intake see little added benefit.
Zinc supports the protein synthesis and cell division that drive the follicle hair cycle, and correcting a low zinc status can help shedding tied to deficiency; routine high-dose use in replete people is not justified and can impair copper status.
Low iron stores (ferritin) are associated with telogen hair shedding, especially in menstruating women, and repletion can help in that specific case; iron should be guided by ferritin testing and not taken blindly, since excess iron is harmful.
The vitamin D receptor is expressed in the hair follicle and participates in normal follicle cycling, and low vitamin D status has been linked to several patterns of hair loss; correcting a deficiency is reasonable, though regrowth benefit from supplementing replete people is unproven.
Saw Palmetto may partially inhibit 5-alpha-reductase, the enzyme that converts testosterone to DHT, so it is aimed at androgenetic (pattern) hair thinning rather than other causes; the evidence is modest and weaker than prescription options, so treat it as supportive.
Silicon is incorporated into connective tissue and may influence hair shaft strength and elasticity; small trials suggest improved tensile properties, but evidence is limited and effects on visible thickness are uncertain.
How the pieces combine.
The mechanistic rationale for stacking these together rather than taking them in isolation.
- Get ferritin tested before adding Iron; supplement only if it is low and recheck periodically, since unneeded iron is harmful and not just unhelpful.
- Separate Iron from Zinc by about 2 hours, because they compete for the same intestinal absorption pathway and taking them together reduces uptake of both.
- Saw Palmetto targets androgenetic (pattern) thinning only; it is not expected to help shedding from low iron, thyroid issues, or stress, so match the cause to the tool.
- Take Vitamin D3 with a meal that contains some fat, since it is fat soluble and absorbs better that way.
- Treat this stack as supportive: correct any underlying deficiency and protein intake first, expect modest results, and see a clinician for sudden, patchy, or rapid hair loss.
Cost and commitment.
A rough monthly cost and how involved the protocol is to run.
The evidence behind it.
Overview citations for this protocol. Each supplement's own profile carries its full source list.
- Almohanna HM et al. The Role of Vitamins and Minerals in Hair Loss: A Review. Dermatol Ther (Heidelb). 2019;9(1):51-70. PubMed
- Guo EL et al. Diet and hair loss: effects of nutrient deficiency and supplement use. Dermatol Pract Concept. 2017;7(1):1-10. PubMed
- Drake L et al. Evaluation of the Safety and Effectiveness of Nutritional Supplements for Treating Hair Loss: A Systematic Review. JAMA Dermatol. 2023;159(1):79-86. PubMed
Common questions.
Quick answers drawn from the stack above.
What is in the Hair Growth & Thickness Protocol?
The Hair Growth & Thickness Protocol combines 7 supplements for skin & hair: Collagen Peptides, Vitamin B7, Zinc, Iron, Vitamin D3, Saw Palmetto, and Silicon. 2 are core; the rest are optional.
How much does the Hair Growth & Thickness Protocol cost?
NutriStack estimates the Hair Growth & Thickness Protocol at about $35-55/mo, depending on the forms and brands you choose and whether you run the optional add-ons.
Is the Hair Growth & Thickness Protocol backed by evidence?
Each supplement in the protocol carries its own evidence tier (0 rated strong here) and links to PubMed-cited sources. NutriStack does not rank or score brands and takes no manufacturer payments; this is an informational reference, not medical advice.
Build it in the app
Run the hair growth & thickness protocol in NutriStack.
Add the stack to NutriStack to track timing, screen it for interactions, and see a Stack Score that updates as you tune it.