FullyVital vs. Heyhair: Which Anti-Gray System Wins?

Two names keep coming up when you search for anti-gray supplements: FullyVital and Heyhair.

Both promise to support your hair's natural color from the inside.

But their formulas are very different — and so are the results they're designed to support.

Key fact: In a FullyVital customer survey (April 2025), 85% of users reported noticing fewer grays after 90 days of consistent use.

If you're tired of spending $200 a month at the salon and want to know which system is actually worth your time, this breakdown is for you.

What Does Each System Actually Include?

FullyVital is an inside-and-outside system: a daily supplement plus a scalp serum.

Heyhair, based on its current public listing, is primarily a supplement-only approach.

That difference matters.

Gray hair starts in the follicle — and the follicle responds to both what you feed it internally and what you apply topically.

A topical serum can deliver actives directly to the scalp, where pigment cells live.

A supplement alone has to travel through digestion first, then reach the follicle through the bloodstream.

FullyVital's two-product system is designed to support your hair at the root causes of graying — inside and out — simultaneously.

If you're ready to try the full system, the Anti-Gray 30-Day Kit includes both the serum and the supplement.

Heyhair vs. FullyVital: Active Ingredients Side by Side

The fastest way to compare two formulas is to look at what's actually in them.

Here's an honest breakdown based on publicly listed ingredients.

The gap isn't just about brand names.

It's about which root causes each formula is designed to address.

The 5 Root Causes of Graying — Which System Covers Them?

FullyVital's formula is built around five root causes that research links to graying hair.

Here's how each cause maps to what's in the system — and where Heyhair's ingredient list falls short.

1. Oxidative Stress (Free Radicals)

Free radicals damage pigment cells over time.

FullyVital's supplement includes GliSODin — a gliadin-protected form of SOD (superoxide dismutase, your body's primary antioxidant enzyme) — to help support your body's own antioxidant defenses.

Glutathione, Astaxanthin, Selenium, and Polypodium round out a multi-antioxidant complex designed to help defend the follicle against free-radical damage.

The serum adds EUK-134, a SOD/catalase-mimetic antioxidant that helps neutralize follicular peroxide directly at the scalp.

2. Hydrogen Peroxide Buildup

Hydrogen peroxide builds up in the follicle as we age.

It bleaches hair from the inside — that's the biology behind graying.

FullyVital's serum contains Silverfree, formulated to help reduce the hydrogen-peroxide buildup associated with graying.

Heyhair's ingredient list does not appear to address this mechanism.

3. Declining Melanin Production

Melanin — the pigment that gives hair its color — requires copper and tyrosine to be made.

FullyVital includes 1 mg of copper (carrying its EU-authorized role in normal hair pigmentation) and 400 mg of L-Tyrosine, the building block your body uses to support natural pigment production.

Heyhair includes copper, but L-Tyrosine does not appear on its public ingredient list.

4. Stress

Research links chronic everyday stress to accelerated graying.

FullyVital includes Rhodiola (300 mg) and L-Theanine (200 mg) — adaptogens that support your resilience to everyday stress.

This combination does not appear in Heyhair's formula.

5. Scalp Aging (Stem-Cell Decline)

As follicles age, their stem-cell environment shifts.

FullyVital's serum includes Eterwell Hair, a senolytic active designed to help support the scalp's stem-cell environment as hair ages.

Capilia Longa and Panax Ginseng add botanical support for a healthy scalp environment.

None of these actives appear in a supplement-only formula.

What Real FullyVital Users Are Saying

Numbers matter — but so do real experiences.

Jen H. put it simply: "My stylist has been amazed by the reduction in my grays — love these products!"

Shana G. added: "I see much less grays in the mirror — I don't have to dye my hair for 14 weeks now."

That last one stands out.

Fourteen weeks between dye appointments — for a woman who used to go every three to four weeks, that's real freedom.

FullyVital holds a 4.7 out of 5 rating across more than 21,600 customers.

And every purchase is backed by a 120-day money-back guarantee.

Try it risk-free for four months — if you're not seeing results, you'll get a refund.

Which System Is Right for You?

If you want a supplement to fill nutritional gaps linked to graying, Heyhair covers the basics.

But if you want to support your hair at every root cause — oxidative stress, peroxide buildup, pigment decline, stress, and scalp aging — you need a system that works from both directions.

FullyVital's inside-and-outside approach is designed to do exactly that.

The Anti-Gray 30-Day Kit gives you the supplement and the serum together — give it a full growth cycle and see what your follicles can do.

Frequently Asked Questions

Is FullyVital better than Heyhair?

FullyVital and Heyhair both contain nutrients that support hair health, including copper and B vitamins.

FullyVital's formula adds L-Tyrosine, a multi-antioxidant complex (GliSODin, Glutathione, Astaxanthin), stress adaptogens (Rhodiola, L-Theanine), and — crucially — a topical serum with clinically-studied actives like Greyverse, Silverfree, and Eterwell Hair.

FullyVital is designed to support all five root causes of graying; Heyhair's listed formula addresses fewer of them.

Does Heyhair have a topical serum?

Based on Heyhair's current public product listing, it is a supplement-only system and does not include a topical serum.

FullyVital's serum delivers actives like Greyverse (an α-MSH biomimetic peptide) and Silverfree directly to the scalp, where pigment cells are located.

How long does FullyVital take to work?

Hair grows slowly — roughly half an inch per month — so meaningful results take time.

In a FullyVital customer survey (April 2025), 92% noticed hair felt softer and shinier in 30 days, 88% reported seeing new pigment at the roots in 60 days, and 85% reported noticing fewer grays in 90 days.

FullyVital recommends giving the system a full growth cycle for a fair assessment — and backs that with a 120-day money-back guarantee.

What are the main ingredients in FullyVital's Anti-Gray system?

The supplement includes Copper (1 mg), L-Tyrosine (400 mg), GliSODin (250 mg), Glutathione, Astaxanthin, Selenium, Rhodiola (300 mg), L-Theanine (200 mg), Zinc, Biotin, and a full B-complex.

The serum features Greyverse (2%), Silverfree (1.5%), Arcolys (1%), Melanogray (1%), EUK-134, Eterwell Hair (2%), Capilia Longa, Panax Ginseng, and Copper Peptides.

Is FullyVital safe to use?

FullyVital is vegan, cruelty-free, drug- and hormone-free, and third-party tested for heavy metals.

It is non-GMO, GMP-certified, and made in a USA, FDA-registered facility.

One allergen note: GliSODin is derived from wheat gliadin, so the supplement contains wheat and is not gluten-free.

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Transparency note: This comparison was written by FullyVital. Heyhair ingredient information is based on publicly available listings as of June 2026 and may have changed. We encourage you to review both labels directly before purchasing.

References

1. European Food Safety Authority (EFSA). Scientific Opinion on the substantiation of health claims related to copper. EFSA Journal, 2010.
2. Trüeb RM. Oxidative stress in ageing of hair. International Journal of Trichology, 2009.
3. Wood JM, et al. Senile hair graying: H₂O₂-mediated oxidative stress affects human hair color. FASEB Journal, 2009.
4. Thom E. Stress and the Hair Growth Cycle: Cortisol-Induced Hair Growth Disruption. Journal of Drugs in Dermatology, 2016.
5. EFSA. Scientific Opinion on the substantiation of health claims related to biotin and zinc for normal hair. EFSA Journal, 2010.