PD-5 Complex vs Vegamour: Which for GLP-1 Hair Loss?

Updated 2026-04-18 10 min read By Provant Labs Research Team

Both are topical serums applied directly to the scalp. Both have a clean ingredient aesthetic and DTC brand positioning. But they were built for different problems. Vegamour's GRO Hair Serum is designed for general hair thinning, using plant-derived phyto-actives. PD-5 Complex is formulated specifically for GLP-1 and rapid-weight-loss telogen effluvium, using peptides and saw palmetto as primary actives.

If you're losing hair because of Ozempic, Wegovy, or Mounjaro, the difference matters.

Quick Overview

Vegamour launched in 2019 and grew rapidly during the clean beauty wave, reaching distribution at Sephora and building a strong brand around vegan, plant-based haircare. Their flagship GRO Hair Serum uses GROActive+ (a proprietary phyto-active complex featuring mung bean, red clover, and curcumin). The company has raised $80 million from General Atlantic and is one of the most recognized names in the topical hair loss space.

PD-5 Complex is formulated specifically for GLP-1-related telogen effluvium (TE). It combines five bioactive peptides (including biomimetics of VEGF, bFGF, and IGF-1) with saw palmetto extract and rosemary extract, targeting the follicle environment disrupted by rapid weight loss.

Comparison Table

Feature	PD-5 Complex	Vegamour GRO Hair Serum
Format	Topical serum	Topical serum
Primary actives	5 bioactive peptides + saw palmetto + rosemary	GROActive+ phyto complex (mung bean, red clover, curcumin)
Target condition	GLP-1 / rapid weight loss telogen effluvium	General hair thinning (androgenic, stress, aging)
GLP-1 specific?	Yes	No (FAQ states it should not affect weight or metabolism)
Saw palmetto?	Yes (topical)	No
Rosemary extract?	Yes	No
Peptide actives?	Yes (5 biomimetic peptides)	No
Vegan?	Yes	Yes
Clean formula?	Yes	Yes
Subscription price	$99/month	$39-64/month (subscription)
One-time option?	Yes	Yes
Clinical evidence basis	Ingredient-level RCTs (rosemary, saw palmetto, peptides)	Internal 30-person study (not peer-reviewed)
NAD compliance issues?	None	Yes (NAD required claim retractions)
Designed for TE?	Yes	Not specifically
Bottom line	For GLP-1 / weight-loss TE specifically	For general chronic hair thinning

Vegamour: Where It's Strong

Vegamour has real strengths, and this comparison isn't about dismissing them.

Brand and distribution. Vegamour is available at Sephora, Ulta, and major retailers. They've built significant brand trust in the clean beauty space, and their customer base is genuinely loyal. When women discover hair loss without a GLP-1 context, Vegamour is often the first topical serum they encounter.

Price. At $39-64/month on subscription, Vegamour is more accessible than PD-5 Complex. For women who aren't on GLP-1s but want a plant-based topical for mild general thinning, the price difference is meaningful.

Clean formulation. The GROActive+ complex is genuinely free of many problematic additives, and Vegamour's commitment to vegan, clean ingredients is real, not just marketing. No parabens, no phthalates, no sulfates.

The GRO serum is a real product. Despite the NAD issues (more on that below), the formula has real active ingredients with some mechanistic plausibility. Red clover is a phytoestrogen that may support hair cycling. Mung bean sprout extract has been studied in vitro for follicle-stimulating properties. Curcumin has anti-inflammatory properties. These are reasonable botanical actives for the problem they're addressing.

Vegamour: Where It Falls Short for GLP-1 Hair Loss

It was not designed for GLP-1-related shedding. This isn't a minor caveat. Vegamour's own FAQ explicitly states that GROActive+ "should not affect weight or metabolism." That positioning makes sense for a general thinning serum, but it also means the formula wasn't built around the specific mechanism driving your hair loss.

GLP-1 hair loss is telogen effluvium triggered by rapid caloric restriction and weight loss, with a specific hormonal component (reduced LH and FSH lowering estrogen) that's distinct from the pattern of androgenic alopecia or aging-related thinning that Vegamour targets. A formula built for one mechanism may not adequately address the other.

The clinical evidence is thin. Vegamour cites a clinical study on their website, but it's an internal 30-person study that is not peer-reviewed and not published in an indexed journal. The National Advertising Division (NAD) reviewed Vegamour's claims and required them to retract statements including "reduce shedding by up to 90%" and "56% more density." Those claims were not substantiated. Their current language is more cautious: "a clinically proven serum for thicker, fuller-looking hair." That's cosmetic language, which is appropriate, but it reflects a different evidentiary bar than ingredient-level RCTs.

No saw palmetto, no rosemary. Saw palmetto applied topically has been shown to reduce shedding by 22.19% in a 16-week RCT (Sudeep et al. 2023, n=80). Rosemary extract has been compared head-to-head against minoxidil 2% in a published study (Panahi et al. 2015, SKINmed, n=100), with comparable results at 6 months. These are two of the best-evidenced ingredients for follicle support. Neither is in Vegamour's formula.

No peptides. Biomimetic peptides that signal follicles toward the growth phase are absent from Vegamour's formula. Peptide-based RCTs (including Rinaldi et al. 2019, n=60, which showed 68% improvement in hair density at 4 months) represent some of the most promising clinical data for TE specifically. That mechanism is simply not present in Vegamour.

PD-5 Complex: Where It's Strong

GLP-1 specific formulation. The formula was built around the telogen effluvium pattern triggered by rapid weight loss. That means the active ingredients target the specific environment that GLP-1s create: follicles shifted into resting phase by metabolic stress, with nutritional depletion compounding the trigger.

Ingredient-level RCT evidence. Each primary active has clinical research behind it:

Rosemary extract: Comparable to minoxidil 2% in the Panahi et al. 2015 RCT (SKINmed, n=100, 6 months)
Saw palmetto (topical): 22.19% reduction in shedding, 7.61% improvement in density (Sudeep et al. 2023, n=80, 16 weeks)
Biomimetic peptides: 68% improvement in hair density at 4 months in a double-blind RCT (Rinaldi et al. 2019, n=60)
VEGF-biomimetic peptide: mechanistic evidence for follicular vascularization (Bassino et al. 2016, Experimental Dermatology)

No overclaiming. Unlike Vegamour's retracted claims, PD-5 Complex positions as scalp support, not a cure. "Supports follicle health during weight-loss-related shedding" is a defensible cosmetic claim backed by ingredient-level data.

PD-5 Complex: Where It Falls Short

Price. At $99/month, it costs more than Vegamour's serum. For women comparing topical serums on price alone, that's a real barrier.

No product-level RCT. Like Vegamour, PD-5 Complex doesn't have a published clinical trial on the specific product formulation. The evidence is ingredient-level. That's the industry standard for cosmetics, but it's worth being clear about the difference.

Newer brand. Vegamour has years of distribution history, thousands of reviews, and Sephora placement. Provant Labs is newer. If brand tenure and third-party retail presence are important to you, Vegamour has a stronger track record there.

The Core Question: What Are You Treating?

This is where the comparison comes down to one question.

Are you losing hair because of GLP-1 medication or rapid weight loss? Or are you experiencing chronic androgenic thinning or age-related thinning that predates any medication?

If your hair loss started or worsened after beginning Ozempic, Wegovy, Mounjaro, or Zepbound, the mechanism is telogen effluvium triggered by rapid weight loss. GLP-1-induced TE has a specific profile: diffuse shedding across the scalp, onset 2-4 months after weight loss begins, and a compound nutritional deficiency component from appetite suppression. Vegamour wasn't built for this and doesn't contain the actives most supported for it.

If you have longstanding androgenic thinning or general chronic hair thinning unrelated to GLP-1 use, Vegamour is a reasonable option. Their phyto-active complex has plausible mechanisms for chronic thinning, a clean formula, and accessible pricing.

And if you're on a GLP-1 and have been experiencing hair loss for months, the mechanism-first framework gives you a clearer answer.

What the Evidence Gap Means in Practice

For GLP-1-related TE, choosing a treatment based on mechanism match matters more than it does for mild chronic thinning. Here's why.

Chronic androgenic thinning (the type Vegamour targets) is a gradual, ongoing process. If a product doesn't work perfectly, you lose a few more months of density. The stakes are real but the pace is slow. Most people can try Vegamour for 90 days, see mild improvement, and continue.

GLP-1 telogen effluvium has a specific active window. The shedding phase is most intense in months 3-6 after weight loss begins. The follicle support window, when active topical intervention makes the most difference, is roughly months 3-9. After that, weight stabilization ends the trigger and natural recovery begins with or without treatment.

If you spend months 3-6 using a formula designed for androgenic thinning (botanical phyto-actives targeting general chronic thinning), you're not optimally using the support window for your specific condition. The window closes either way. But whether you exit that window with maximally supported follicles depends on whether you used a mechanism-matched approach.

That's not a reason to fear Vegamour. It's a reason to understand what you're treating before choosing what to use.

And if you're in month 1 of a GLP-1 medication, proactive is almost always better than reactive. Starting scalp support before peak shedding, rather than waiting until handfuls are coming out in the shower, is associated with better reported outcomes. The biology supports this: once a follicle has already shifted to telogen and released the hair, that hair is gone. Supporting follicles still in anagen during the early stress period gives you more to work with.

How to Choose

Choose PD-5 Complex if:

Your hair loss started or worsened after beginning a GLP-1 medication
You want ingredients with the strongest RCT evidence for TE (rosemary, saw palmetto, peptides)
GLP-1-specific formulation matters to you
You want a serum without overclaimed clinical evidence
You're in the active 3-9 month support window and want mechanism-matched ingredients

Choose Vegamour if:

You have pre-existing androgenic thinning unrelated to GLP-1
Budget is the primary consideration
You prefer a brand with longer market history and retail distribution
Your hair loss pattern is chronic and mild rather than acute TE

FAQ

Does Vegamour work for GLP-1 hair loss?

Vegamour's GRO serum was not designed for GLP-1-related telogen effluvium, and their FAQ explicitly notes the formula doesn't affect weight or metabolism. It targets general hair thinning using plant-based phyto-actives. For GLP-1-specific TE, formulas containing saw palmetto, rosemary extract, and biomimetic peptides have more directly relevant clinical evidence.

Is Vegamour clinically proven?

Vegamour has cited an internal clinical study with 30 participants. The National Advertising Division (NAD) required them to retract claims like "reduce shedding by up to 90%." Their current claims use cosmetic language. The ingredient actives (mung bean, red clover, curcumin) have some mechanistic research behind them but no peer-reviewed RCTs demonstrating the specific claims Vegamour previously made.

What's better for telogen effluvium: peptides or plant actives?

For TE specifically, the strongest clinical evidence involves rosemary extract (Panahi 2015, n=100, comparable to minoxidil 2%), saw palmetto (Sudeep 2023, n=80, 22% shedding reduction), and biomimetic peptides (Rinaldi 2019, n=60, 68% improvement in density at 4 months). Phyto-actives like mung bean and red clover have theoretical mechanisms but less RCT data for TE specifically.

Why is PD-5 Complex more expensive than Vegamour?

PD-5 Complex contains five bioactive peptides in addition to saw palmetto and rosemary, targeting the GLP-1 telogen effluvium pattern specifically. Peptide synthesis and concentration are more expensive than botanical phyto-actives. The price difference reflects ingredient cost and GLP-1-specific formulation, not just brand positioning.

Can I use both Vegamour and PD-5 Complex?

Using two serums simultaneously on the same scalp isn't typically recommended because it makes it difficult to assess which is working and can create formula interactions. If you're on a GLP-1, the GLP-1-specific formula is the more targeted starting point. Evaluate for 90 days before adding another product.

Is Vegamour safe?

Yes. Vegamour uses cosmetic-grade ingredients and has a clean formulation. The NAD compliance issues were about claim accuracy, not product safety. The formula itself is well-tolerated.

Ready to support your hair during your GLP-1 journey?

See the PD-5 Complex