The Glow Hair Stack Berry Duo Review
The Glow Hair Stack pairs the berry shampoo and berry conditioner for $58.00, against $64.00 for the two bought separately at their current sale prices — a $6.00 saving, or about 9%. Both products disclose 0.1% GHK-Cu and the bundle page gives clearer conditioner instructions than the standalone conditioner page does. It is a straightforward bundle: the same two products, slightly cheaper, with better directions.
Who it fits
Best fit for
- Anyone who has already decided on the berry scent and wants both wash-day steps.
- Shoppers who want the conditioner-specific application instructions, which are clearer here than on the standalone page.
- People starting an Amplified Glow haircare routine from scratch.
Consider another option if
- You only need one of the two products — the saving does not apply.
- You prefer lavender; the Lavender Glow Hair Stack is the equivalent bundle.
- You want the higher disclosed peptide concentration, which the lavender line publishes.
What this product is
The Glow Hair Stack is a two-product bundle: one Amplified Glow™ Copper Peptide Strengthening Shampoo – Berry and one Amplified Glow™ Copper Peptide Nourishing Conditioner – Berry, each 473 mL. Amplified Glow discloses 0.1% GHK-Cu for the bundle, matching both components.
It is not a distinct formula. It is the same two products sold together at a lower combined price.
Formula and ingredient context
The bundle page discloses the combined hero ingredient set across both products: GHK-Cu, sodium hyaluronate, sea kelp extract, rosemary extract, green tea extract, keratin, niacinamide, panthenol, jojoba oil and coconut oil. Keratin, niacinamide and panthenol belong to the conditioner; sea kelp and rosemary to the shampoo.
One handy thing about the bundle page: it gives proper conditioner directions. The standalone berry conditioner page describes working up a lather, which looks like shampoo wording copied across by mistake. The bundle page has it right — focus on mid-lengths to ends and leave in for 2–3 minutes. There’s more on that in the berry conditioner review.
Routine fit
Shampoo first: apply to wet hair, massage into scalp and hair until a rich lather forms, rinse thoroughly. Conditioner second: focus on mid-lengths to ends, leave in 2–3 minutes, rinse thoroughly.
That is the conventional order, and our guide on shampoo and conditioner order explains why the sequence is what it is and what it does not determine.
Price and value context
The bundle is listed at $58.00, reduced from $74.00. Bought separately at current sale prices, the shampoo is $32.00 and the conditioner is $32.00 — $64.00 total. The bundle therefore saves $6.00, or about 9%.
At regular prices the arithmetic is different: $37.00 plus $37.00 is $74.00, exactly the bundle's regular price. So the bundle offers no saving at all at full price — the $6.00 advantage exists only because the bundle's sale discount is proportionally deeper than the components'.
For 946 mL of total product, $58.00 works out to $6.13 per 100 mL across the pair. That figure blends two different products and is only useful for comparing this bundle against the lavender bundle. Individual products versus a haircare bundle covers when bundling is and is not worth it.
Strengths and limitations
Strengths
- Saves $6.00 against the components at their current sale prices.
- Gives clearer, conditioner-specific directions than the standalone conditioner page.
- Both components disclose the same 0.1% GHK-Cu, so the routine is internally consistent.
- Covers both wash-day steps in one purchase.
Limitations
- No saving at all when both products are at their regular prices.
- Discloses a lower peptide concentration than the lavender line.
- No full ingredient list for either component.
- Bundling is only economical if you want both products in the same scent.
- No patch-test guidance.
What we could not establish
Amplified Glow does not publish these, and we have not confirmed them. We record them as open questions rather than guessing.
- Full INCI lists for both components.
- Whether the bundled bottles are identical to the standalone bottles.
- Fragrance composition.
Safety and patch-test information
Amplified Glow publishes: for external use only, avoid contact with eyes, and discontinue use if irritation occurs.
Customer feedback
No customer reviews yet
We publish genuine, moderated customer reviews only. None have been published for this product yet — we do not display invented ratings.
Be the first to review it →Frequently asked questions
How much does the bundle save?
$6.00 against the two components at their current sale prices, or about 9%. At regular prices there is no saving — the bundle's $74.00 regular price is exactly the sum of the two components' regular prices.
Is the bundle a different formula?
No. It is the same berry shampoo and berry conditioner, sold together.
Which directions should I follow for the conditioner?
The bundle page instructions — focus on mid-lengths to ends, leave in 2–3 minutes, rinse. The standalone conditioner page describes lathering, which appears to be shampoo copy carried across in error.
Evidence notes
Bundle contents, combined price, the 0.1% GHK-Cu disclosure and the two-step directions come from The Glow Hair Stack product page. Component prices come from the individual shampoo and conditioner pages. All were checked on the date shown at the top of this page.
The $6.00 saving and the $6.13 per 100 mL figure are our own arithmetic from those published prices and volumes.
Sources and evidence
Current catalogue membership, listed price, sale status and stock state.
Checked 2026-07-24 · brand shop listing
Bundle contents, combined price, 0.1% GHK-Cu disclosure and two-step directions.
Checked 2026-07-24 · brand product page
Amplified Glow Editorial Team
Product research and editorial standards
This team works for Amplified Glow, the company that makes and sells the products reviewed here. Editorial pay isn’t tied to sales, review sentiment, or customer ratings — so when a product is thinly documented or has a drawback, the review says so.
Spotted something wrong? Request a correction.
Related comparisons
Individual Products vs a Haircare Bundle
At current sale prices, the bundle. The berry duo saves $6.00 against $64.00 for the pair, and the lavender duo saves $4.00 against $56.00. At regular prices the berry bundle saves nothing — its $74.00 regular price is exactly the sum of the two components. The saving comes from the bundle's deeper promotional discount, not from bundling itself, so the arithmetic needs redoing whenever prices change.
Compare attributes →Product comparisonBerry vs Lavender Amplified Glow Haircare
More than the scent. The lavender line discloses 0.15% GHK-Cu against the berry line's 0.1%, names more supporting ingredients, and costs less — $28.00 per bottle against $32.00. The berry line makes the clearer free-from claims, stating "Sulfate Free" outright where the lavender line states "Sulfate-Free Surfactants". If you have no scent preference, the lavender line is better specified for less money.
Compare attributes →Related ingredients
GHK-Cu
GHK-Cu is a small peptide complexed with copper. In cosmetics it appears under the INCI name Copper Tripeptide-1 and is used as a conditioning ingredient. It is the ingredient every Amplified Glow copper peptide product is built around, and the only one for which the brand publishes concentrations — between 0.1% and 0.15% depending on the product.
Read the ingredient page →Structural protein, or a hydrolysed fraction of oneKeratin
"Keratin" on a label isn’t a single ingredient. Several versions exist — hydrolyzed keratin, keratin amino acids, and others — differing in source and size. Amplified Glow names keratin in four haircare products without saying which form or source, so the exact ingredient isn’t confirmed.
Read the ingredient page →Provitamin B5 alcoholPanthenol
Panthenol, often labelled pro-vitamin B5, is used in cosmetics as a humectant and conditioning agent. It appears in four Amplified Glow products across skincare and haircare. No concentration is published for any of them.
Read the ingredient page →Related guides
Shampoo and conditioner order
Shampoo first, conditioner second. Shampoo cleanses the scalp and lifts buildup; conditioner is applied to mid-lengths and ends afterwards and left for a couple of minutes before rinsing. The order matters because the two products do opposite things — cleansing removes, conditioning deposits — and doing them the other way round removes what you just deposited.
Read the guide →GuideHow to interpret price per ounce
Price per unit is a fair comparison between products of the same format with the same job. It breaks down across formats, across formulas with different disclosed actives, and whenever you do not finish the container. The assumption underneath every per-unit calculation is that you use all of it — and for products people try and abandon, that assumption often fails.
Read the guide →