Frequently asked questions

Coastline is a complete longevity supplement system split into three components that work with your circadian rhythm: a Morning Blend (powder with 7 ingredients), Morning SoftGels (4 fat-soluble ingredients), and Evening Capsules (3 calming and recovery ingredients). Together they deliver 13 science-backed ingredients at clinical doses.

Your body follows a circadian rhythm, and our formulas are designed to align with it. We include energizing ingredients like creatine and magnesium in the Morning Blend, and calming, recovery-oriented ingredients like L-theanine and lithium orotate in the Evening Capsules to help your body perform and recover optimally.

Healthspan is the length of time you live with vitality, clarity, and independence -- not just lifespan. Coastline is built to support the systems that decline with age: energy metabolism, mood, sleep, inflammation, joints, skin, and cognition. The goal is not just to live longer -- it is to live better.

Astaxanthin, Lutein, Zeaxanthin, and CoQ10 are fat-soluble, meaning they absorb best when taken with dietary fat. The softgel format ensures optimal delivery. Water-soluble ingredients go in the powder blend.

We sell exclusively through our website to maintain full control over quality, freshness, and customer experience. No middlemen, no price games -- just direct support from our team to you.

13 total: Ergothioneine, Taurine, Creatine, Glycine, Inulin, Magnesium, and Glucosamine in the Morning Blend. Astaxanthin, Lutein, Zeaxanthin, and CoQ10 in the SoftGels. L-Theanine, Lithium Orotate, and Glucosamine in the Evening Capsules. All at clinical doses backed by human studies.

Yes. At 400 mcg, this is a trace dose -- roughly 1/100th of prescription lithium for bipolar disorder. It matches levels found naturally in tap water in many regions. Studies at this dose show cognitive and mood benefits with no adverse effects.

Ubiquinone is actually more effective than ubiquinol for cardiovascular outcomes. Your body converts between the two forms as needed. Most ubiquinol products actually oxidize to ubiquinone anyway. Coastline uses the trans-form -- the same form your body produces.

There is no meaningful advantage to micronized creatine monohydrate over regular creatine monohydrate. Both dissolve and absorb effectively. We use the most studied, most proven form.

No. Creatine may slightly increase creatinine levels -- this is a normal response to supplementation, not a sign of kidney damage. Cystatin C is a better marker for kidney function in creatine users. Creatine has been shown to be very safe even at 30g per day for 5 years.

We use highly bioavailable, vegan-friendly forms: magnesium citrate, vegan glucosamine sulfate, astaxanthin from Haematococcus pluvialis microalgae, lutein and zeaxanthin from marigold extract, and CoQ10 as crystalline-dispersed ubiquinone. All minerals are selected for purity, absorption, and consistency.

Inulin is a prebiotic fiber that supports gut health -- but for some people, it can temporarily cause bloating, especially if your diet is low in fiber. This usually fades as your gut adjusts. Coastline uses 4g -- below the 5g threshold where discomfort typically begins. If you are sensitive, start with a half scoop for a few days.

Yes. We follow strict third-party testing protocols to ensure all products meet standards for purity, potency, heavy metals, and microbial safety. Everything is manufactured in certified cGMP facilities.

Most people feel improvements in sleep, focus, and energy within the first 1-2 weeks. Deeper benefits -- like joint support, skin resilience, and gut health -- build gradually with consistent daily use. Think long-term investment, not overnight fix.

No problem. Longevity is about consistency, not perfection. Just resume your regular routine the next day -- your body will thank you over time.

L-Theanine promotes relaxation without drowsiness. It supports natural sleep onset, not sedation. You may notice it is easier to fall asleep and that your sleep quality improves.

It is simple: Morning -- 1 scoop of Morning Blend powder mixed with water + 1 softgel. Evening -- 2 capsules with or after dinner. That is it -- 1 scoop + 3 pills a day for full coverage.

Mix one scoop with 8-12 oz of cold water and take with your first meal of the day. You can also add it to protein shakes, smoothies, juice, or flavored waters.

The unflavored version has a mild, neutral taste that mixes easily with water. Coastal Lemonade has a light citrus flavor. Both work well in shakes and smoothies.

Take 2 capsules 30-60 minutes before bed with water.

You do not have to, but many people find it more comfortable on a full stomach. Feel free to mix it with your morning smoothie or drink it on its own after breakfast.

We love to add it to protein shakes, smoothies, juice, flavored waters, or any other cold beverage. It has a very mild taste so just about any cold drink will work well.

Store supplements in a cool, dry place away from direct sunlight and out of reach of children. Do not use if the seal is broken or missing.

Yes, absolutely. With Coastline you can adjust the frequency of delivery (1-3 months) and/or cancel anytime. No penalties or fees.

We offer a 60-day money-back guarantee. If you are not satisfied for any reason, contact our support team and we will issue a full refund -- no questions asked.

Orders placed before 2 PM ET ship the same business day. Standard delivery takes 3-5 business days. All orders ship free.

Coastline is currently available to customers in the USA and Canada. If you are outside the USA or Canada and are interested in shipping to your address, please send us an email at support@coastlinelongevity.com and we can provide details on shipping fees to your location.

All ingredients are used at levels shown to be safe and effective in human studies. Most have safety data at doses 2-10x higher than Coastline doses. All products are third-party tested for purity and potency.

Yes -- all Coastline Longevity products are 100% vegan, non-GMO, and free from major allergens like gluten, soy, and dairy. Even ingredients like glucosamine, which are often sourced from shellfish, are vegan-certified in our formulas.

While our ingredients are generally safe and well-tolerated, we recommend consulting your healthcare provider if you are on medication or taking other supplements with overlapping ingredients (like magnesium, glycine, or lithium). Always best to double-check.

Yes -- Coastline is designed for all adults looking to support their healthspan. Most users are 30+, but anyone focused on long-term vitality can benefit from our system. It is safe and effective for both men and women.

If you are pregnant, nursing, or planning to be, please consult your doctor before taking Coastline. While our ingredients are generally safe, this is an important step with any supplement.