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.

How often do I use Activating Serum?

Activating Serum should be used every day. This can be on a damp scalp or dry scalp, after a shower or on a no-wash day. Daily use is the key to hair regrowth with the Serum. 

How do I use the Regimen?

Start your Regimen by cleansing and conditioning your scalp and strands with Detoxifying Shampoo and Fortifying Conditioner. Once you are out of the shower, towel dry your hair and apply one full dropper of Activating Serum to your scalp. Massage Activating Serum into your scalp for 30-60 seconds. Then, blow dry your scalp on a cool or warm setting for 1-2 minutes. Detoxifying Shampoo and Fortifying Conditioner are gentle enough for daily use and we strongly recommend using Activating Serum every day. This can be on a dry or damp scalp, but consistency is key.

Check out this blog post on creating a routine with the Regimen.

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

No, you can apply to either a dry scalp, or a towel-dry/damp scalp after a shower. Either way, we highly recommend blow drying your scalp on a cool or warm setting after applying our serum. Bacteria, yeast, and other aggressors that can inhibit the health of your hair follicles thrive on a damp, warm scalp. We recommend blow-drying your scalp after every shower and after every product application to prevent these microbes from hanging out on your scalp.

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 have before and after pictures?

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

When will I start seeing results with Activating Serum?

Activating Serum starts working immediately, however, it takes most of our customers 3-4 months to see new growth as it takes time for your hair cycle to respond to treatment. Everyone's experience with hair loss is different and so these results can vary. If you have any questions about your own hair journey, our Customer Experience team is happy to assist! Contact us at

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.

Are all your products 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.

Are all your products safe for use while pregnant and during postpartum?

Yes! All our products were formulated to be safe for use while pregnant and breastfeeding, but it’s always best to check with your doctor before you try new products. The Activating Serum also helps to counteract postpartum hair loss.

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.

Are all your products safe for color-treated hair?

Yes, all our products can be safely used 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.

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.

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.

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' after 3 to 4 months of consistent use.

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.

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.

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.

Where are your products made?

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

Are these products safe for children?

Our products are all-natural and safe for children, but if you do use the Activating Serum on your little ones, be sure to consult with your doctor first. The Activating Serum has a tingling / warming sensation when applied. This should never hurt, but it can be uncomfortable for some.

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 order more than one Activating Serum at a time?

Yes! You can add additional Activating Serums to your monthly delivery by logging into your account. Go to "Manage Subscription" and select the photo of the Activating Serum to add it to your next order. Our Customer Experience team can help with this or large bulk orders. Email us at

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:

How do I get a refund?

If you’re not delighted with any of our products, notify us at You can return your purchase 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

Do I have to sign up for a subscription?

This depends on your hair goals! If your goal is hair growth, consistency is key when it comes to supporting the health of your scalp and strands. It’s the little steps you take every day that really make a difference, that’s why we decided to offer Activating Serum as a subscription only.

If you are interested in trying our products without the subscription, check out The Regimen which is available for one-time purchase or as a subscription.

Can I skip upcoming orders and cancel my subscription at any time?

Yes! As a subscriber, you can skip upcoming shipments, change the number of days between deliveries, add or swap for different products, and cancel your subscription at any time. To access your subscription, log into your account, then go to “Account” -> “Manage Subscription.” Select “Next Box Ships On” to change your delivery date. Select “Creation Date -> Cancel” to cancel your subscription. 

To access your subscription portal, you must first activate your account by setting a password. An account activation link is sent to your email after you’ve made your first purchase. If you are having any trouble logging in, our team is happy to help! Email us at

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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