We want you to ask questions

For any additional questions, please reach out to We can also be reached by web chat or phone support at (424) 272-6999, Monday – Friday, 10:00am-4pm PST.

Is Activating Serum safe for women and men?

While the underlying causes of hair thinning can be different for men and women, everything we make here at Collective Laboratories is designed to work for all people–regardless of gender.

How often do I use this?

We recommend that you use Activating Serum at least once a day.

Can I use this if I’m experiencing hair loss after pregnancy?

Yes, Activating Serum is safe for women experiencing postpartum hair thinning.

Can I use Activating Serum if I’m breastfeeding?

Activating Serum was formulated to be safe for use while breastfeeding, but it’s always best to check with your doctor before you try new products.

I’m not currently losing hair, but I want to prevent it. Will this help?

Yes! Prevention is the most effective measure that you can take against thinning hair. The active botanicals and science-backed ingredients in Activating Serum help nourish your scalp and maintain follicle health. With regular use, Activating Serum helps maintain your hair’s normal growth cycle.

When will I start seeing results?

Activating Serum starts working immediately, but it can take up to three months for you to see noticeable results simply because it takes a while for your hair cycle to respond to treatment. Patience and consistency are key; new hair doesn’t happen overnight.

Why is this a subscription?

You wouldn’t use an anti-aging cream once and expect to see results, right? The same goes for your hair. Consistency is key when it comes to supporting the health of your scalp and strands, and it’s the little steps you take every day that really make a difference.That’s why we decided to offer Activating Serum in a subscription – so it’s easier to continue supporting your hair every day.

If I stop using Activating Serum, will my hair go back to how it was?

Thinning hair is no different than aging skin or acne. If you stop using your anti-aging cream or acne treatment, your wrinkles and breakouts will gradually come back. The same goes for thinning hair. If you stop using our products, your hair will gradually make its way back to its starting point–unless something has changed inside your body as a result of other health and lifestyle changes. It’s important to stress that this process will be gradual. If you stop using Activating Serum, your hair won’t suddenly change the next day, week, or even month.

Do you use animal testing for your product?

Never! Animal cruelty has no place in our lab or your bathroom. We test our products on ourselves (and our friends) so we know that they really work.

Is Activating Serum safe for color-treated hair?

Yes, you can safely use Activating Serum on color-treated and highlighted hair. We don’t use harsh sulfates or other ingredients that can diminish the lifespan of your dye job, so you’re good to go.

Can I use my regular styling products?

Sure! Activating Serum adds volume and makes your hair feel thicker, so you might not actually need to use other styling products to get the look you want. That said, Activating Serum does play nicely with others. There’s no need to change your regimen if you’re hooked on a specific styling aid.

Where are your products made?

We source ingredients from around the world, but we make our products in our lab in California.

How do you source your ingredients?

We search the world for the best ingredients. We’ll try anything: scalp massages in South Korea, herbal hair masks made by grandmothers in India, rare botanicals from the Amazon rainforest. Led by the wisdom of these traditions, we discover effective natural ingredients that improve hair quality, prevent strand loss, and promote growth. We make an effort to source the highest quality version of each of our ingredients, which often means importing them from other countries. Once we get them into our lab in California, we blend the raw ingredients to create our formulas.

Can I use Activating Serum if I’m also using minoxidil?

Yes! In fact, many of our customers use minoxidil and have been happy with the boost in results they’ve seen from using both treatments together. In addition to their long-term benefits, both Activating Serum and minoxidil can help your hair immediately feel thicker (just blow-dry after application to see the difference), so they also make a great styling combination.

Can I use these products if I’m also using prescription hair loss medication?

Yes, our products work with internal prescription hair loss medications like finasteride and topical medications like minoxidil. If you are using other topical medications, please check with your doctor first before layering treatments.

Why does the Activating Serum make my scalp tingle?

Activating Serum was specifically formulated to increase blood flow to the surface of the scalp in order to promote and maintain the health of your hair follicles. As blood rushes to the surface, your scalp may feel warm. This sensation should dissipate within 5-10 minutes. If, at any point, the warming sensation becomes painful, rinse out the product immediately.

Why do I need to wash my hands after using the Activating Serum?

Activating Serum contains ingredients that can be irritating to your eyes. We recommend washing your hands after use so that you don’t accidentally introduce the product to the eye area.

Is Activating Serum’s warming sensation a sign that this product is burning my scalp?

The warming sensation is an indication that the product is working to increase blood flow to the scalp. It is not a sign of surface skin trauma or exfoliation. The sensation should dissipate within 5-10 minutes and should not cause any lingering scalp sensitivity or redness.

Does my scalp need to be dry when I apply Activating Serum?

You can apply to either a dry scalp, or a towel-dry/damp scalp after a shower. Either way, we highly recommend blowdrying your scalp after applying our serum. This brings two main benefits: First, it adds volume and texture to your hair. Next, and most important, bacteria, yeast, and other aggressors that can inhibit the health of your hair follicles thrive in moist, warm environments. We recommend blow-drying your scalp after every shower and after every product application to prevent these microbes from hanging out on your head - and to bring volume and texture to your hair. 

Does the Activating Serum work for people with Alopecia?

Yes, our Activating Serum does work for people with Alopecia. While the underlying cause of hair loss is sometimes unknown, we do have customers with alopecia who have reported seeing 'baby hairs' have 3 to 4 months of consistent use.

Do you have before and after pictures?

Absolutely we do! Check out our Results section for customer reviews and photos.

Is the Activating Serum FDA approved?

Since the Activating Serum does not contain any drugs, it does not need to be FDA approved. However, we have scientific studies to support the effectiveness of our Serum. You can review the science behind our serum on our website - as well as here:

Do you have any clinical trials to support the effectiveness of the Activating Serum?

You can review the science behind our serum on our site - as well as here:

Can I order more than one Serum at a time?

Yes! To order more than one quantity subscriptions per address, please call us at (424) 272-6999.

Can I use the Activating Serum while taking biotin supplements?

Yes! In fact, wellness supplements and Activating Serum make a great combination. Many of our customers use vitamin supplements (like biotin) and Activating Serum to boost overall scalp and hair health.

How do I get a refund?

If you’re not delighted with any of our products, notify us at and  simply return the container - even if empty - within 30 days of receipt for a refund of your purchase price (shipping label not provided). Send packages to:

Collective Laboratories

202 Bicknell Ave

Santa Monica, CA 90405

Contact Us

You can contact Collective Laboratories support team anytime at or call us at 424.272.6999.
We are also available via social media, on Facebook and Instagram.

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