BiotinVitamin B7

The one everyone reaches for first — and the one that disappoints most.

Biotin is a cofactor for the enzymes that build keratin, the structural protein your hair is made of. It's the ingredient in every drugstore hair gummy, and it's the first thing women on the shot buy.

Here's the catch: biotin only does something if you're actually deficient in it. Most American women aren't — which is why a standalone 10,000 mcg biotin tablet usually does nothing for GLP-1 shedding. The shed isn't a biotin problem in isolation. It's a multi-nutrient problem, and biotin is one line on a long list. Worth including at a real dose, useless as a solo act.

Iron / FerritinStored iron

The number your doctor checks — and the one that crashes hardest on the shot.

Ferritin is your stored iron, and it's one of the most important markers for hair growth that exists. Follicles are among the most metabolically demanding tissues in the body, and they lose access to iron early when stores fall. Many dermatologists want to see ferritin above 50 ng/mL for healthy growth; a lot of shedding women are sitting well below that.

GLP-1s make this worse fast, because red meat is one of the first foods to fall off the plate — early fullness and protein aversion are common. Less red meat means less heme iron means dropping ferritin.

This is the one nutrient we deliberately left out of Mane Reclaim — on purpose. Therapeutic iron doesn't belong in a gummy. It oxidizes, it tastes metallic, and unmonitored iron is genuinely risky (it's the leading cause of pediatric supplement poisoning, and iron overload is a real condition). The right move is to get your ferritin tested and, if it's low, take a targeted iron supplement separately, monitored by your doctor. Any hair gummy bragging about the iron inside it is telling on itself.

ZincTrace mineral

Runs the follicle's repair crew.

Zinc drives the protein synthesis and cell division that the hair growth cycle depends on. Zinc deficiency is a well-documented trigger for telogen effluvium — the same shed pattern GLP-1s cause. It also supports the immune and tissue-repair functions that take a back seat during rapid weight loss.

Like iron and B12, zinc comes mostly from meat, shellfish, and legumes — exactly the foods that shrink in volume on a GLP-1. You're not eating badly; you're just eating far less, and the trace minerals go first.

Vitamin B12Cobalamin

The follicle's fuel line.

Hair follicle cells are among the fastest-dividing cells in your entire body — and that kind of rapid division is impossible without adequate B12. When B12 runs short, the follicle's growth engine stalls and more hairs slip into the resting phase.

B12 comes almost exclusively from animal foods: meat, fish, eggs, dairy. That's the precise food category that contracts on the shot. GLP-1s also slow gastric emptying, which can blunt how well you absorb what B12 you do eat.

IodineThyroid substrate

The thyroid layer almost every hair supplement skips.

This is where Mane Reclaim's logic departs from the rest of the supplement aisle. Iodine is the raw material your thyroid uses to make thyroid hormone, and thyroid hormone — specifically T3 — sets the pace of your hair growth cycle. Low thyroid output means slower follicle cycling, which means more hairs sitting idle in the shedding phase.

Caloric restriction suppresses T3 directly — it's a survival response, your body slowing a metabolism it can't afford to fund. On top of that, modern GLP-1 eating patterns often cut iodized salt, dairy, and seafood, dropping iodine intake at the worst possible moment. Open up Nutrafol, Viviscal, or any drugstore hair gummy and you'll find the thyroid pathway almost entirely ignored. Bariatric protocols never ignored it.

PABAPara-aminobenzoic acid

The forgotten 1941 compound almost no modern formula includes.

PABA is a B-complex–adjacent compound with a genuinely strange history. In 1941, the American physician Dr. Benjamin Sieve published what's widely cited as the first documented study on hair using PABA, reporting that subjects regained hair color and apparent strength. By 1942 he had expanded the cohort to roughly 460 subjects. A 1946 patent summarized that about 82% of his subjects responded favorably at doses between 50 and 600 mg per day.

Then, after about 1950, the research went quiet — an 80-year gap. PABA got reclassified in the popular mind as "the original sunscreen ingredient," and its B-vitamin role in folate metabolism and hair was largely forgotten by the supplement industry. It's in Mane Reclaim because the formula was built from the historical clinical record, not the current supplement-aisle consensus.

A note on evidence: the PABA hair research is mostly mid-20th-century work, not modern randomized trials. We include it for its documented history and mechanism, not as a guaranteed outcome.

Pantothenic AcidVitamin B5

PABA's historical partner.

B5 supports energy metabolism in fast-dividing cells through its role in coenzyme A, and it's long been associated with hair and scalp health. It's worth knowing that the 1940s researchers frequently paired pantothenic acid with PABA — the two were studied together, which is why they appear together here.

Marine CollagenStructural protein

The raw building material.

Collagen supplies amino acids like proline and glycine that serve as building blocks for the keratin structure of hair. Marine collagen is favored for its bioavailability. On a GLP-1, with total protein intake down, giving the follicle targeted structural protein helps make sure there's raw material to actually rebuild with — not just signals telling it to grow.

Vitamin DFat-soluble vitamin

The follicle-cycle regulator.

Hair follicles carry vitamin D receptors, and vitamin D plays a role in cycling the follicle from rest back into active growth. Low vitamin D is associated with telogen effluvium and other diffuse shedding patterns — and vitamin D insufficiency is already widespread before anyone starts a GLP-1, so a reduced, lower-fortified-food diet only compounds it.

Vitamins A, C, E + FolateThe supporting cast

The cofactors that make everything else work.

Vitamin A helps regulate the follicle cycle and sebum — though it's a balance, since megadoses can paradoxically trigger shedding, which is exactly why a measured dose beats a heroic one. Vitamin C is essential for collagen synthesis and helps your body absorb iron from food. Vitamin E is an antioxidant that supports scalp circulation and protects follicle cells from oxidative stress. Folate works alongside B12 in the cell-division pathway your fast-growing follicle cells live and die by.

None of these are headline ingredients. All of them are load-bearing — the difference between nutrients that get used and nutrients that get wasted.