Yes, Hey Sister! is a genuinely effective solution to reduce your period pains, cramps and other mensuration symptoms. Besides the fact it’s been used for centuries in Western herbal medicine to reduce inflammation and pain, research and clinical studies can back up the claims we make about the effects of our products.

We're one of the few companies in the women's health space that takes efficacy seriously and have spent our own money to put our products to the test in clinical settings. We have a few recent observational trials underway and are committed to releasing the findings once they've concluded - as we've done with previous trials. 

Hey Sister! Period offers comprehensive menstruation symptom relief and is proven to help reduce or relieve the following symptoms:

• Menstruation Pain / Dysmenorrhoea.
• Menstrual Spasms / Cramps.
• Heavy Menstruation / Periods.
• Weariness / Tiredness / Fatigue / Feeling of Weakness.
• Abdominal Bloating / Spasm.
• Gastrointestinal Pain.
• Occurrence of Premenstrual Tension Symptoms (PMS).
• Feelings of Aggression / Irritability Associated with Premenstrual Tension.
• Mood Changes / Mood Swings Associated with Premenstrual Tension.
• Breast Pain / Tenderness Associated with Premenstrual Tension.
• Confusion Associated with Premenstrual Tension.
• Symptoms of Mild Anxiety.
• Symptoms of Heartburn.

Yes, Hey Sister! is considered safe for use every period cycle. Out of all the research done on our active ingredients, there's not been one report of harmful side effects. Additionally, a part of what makes Hey Sister so safe to use especially, on a regular basis is the fact that our active ingredients are water soluble and will flush out the body just like a vitamin would once you stop taking it - there's no build-up, lingering effects, or tolerance build-up.

With Hey Sister! Period, most customers report immediate results - at worst - you'll feel the difference same day you start taking it regardless of when you start taking it during your period.

For best results, we recommend you start dosage 1-2 days before your period, or at least as soon as you experience symptoms.

For full, comprehensive results, we recommend taking Hey Sister! for at least 3-period cycles.

If you're skeptical about our products working for you, we provide all new customers with a "Love It Or Money Back" guarantee on all first orders - so there's nothing to lose and everything to gain from trying us out!

Take 2 tablets daily, one in the morning and one in the evening, with or without food and continue for 7 days or as professionally prescribed.

If symptoms persist, talk to your health professional.

Children: Use in children under 12 years is not recommended.

Pregnancy: Do not take if you are likely to become pregnant, pregnant, or breastfeeding.

For a full set of directions always refer to the pack.

Each tablet contains:

Khapregesic® 500 mg (Khaya Senegalensis Dry Stem Bark).

Our products are manufactured in Australia from Australian-grown certified-organic Khaya Senegalensis.

100% Plant-based. No added artificial flavouring, colouring or preservatives.

Free from dairy, gluten, eggs, nuts, and yeast.

Hey Sister! is regulatory approved. Registration numbers AUST L 315762, 407536, 407537.

Yes, Hey Sister! can be taken safely at any time and with any other food, supplement or medication.

Periods are complex, and our bodies even more so. We would be  surprised if you didn't feel any benefit from taking Hey Sister! especially when taken as directed. But if you're one of the unlucky few who don't, don't stress, we got your back.

We provide all new customers with a "Love It Or Money Back" guarantee on all first orders - so there's nothing to lose and everything to gain from trying us out!

Don't be afraid to contact support if you find it doesn't work as expected or if you need help with proper use or dosing.

Orders are processed and dispatched within 24 hours of being received (during weekdays) and should arrive approximately 2 – 10 working days from dispatch depending on the address location.

Although once we ship it out, delivery times are out of our control and subject to Australia Post shipping times, we'll do our best to ensure a speedy arrival and assist with any shipping related support questions or concerns you have.

If you need a speedy delivery we offer a discounted express shipping option, just select it at checkout.

You can manage your subscriptions and view order history by logging in and navigating to heysister.com/account.

Alternatively, contact our support at support@heysister.com, or leave us a message on our live chat.

[6] Lopresti A. et al. "An examination into the safety and efficacy of Khapregesic®, a Khaya senegalensis preparation, on pain, physical and emotional wellbeing in women experiencing menstrual distress: a randomised, double-blind, placebo-controlled trial". Funded by Bioactive Natural Health Pty Ltd.

[5] Barg, C., & Robertson, C. (2019). Khaya senegalensis: Discover Khaya, the period pain reliever. Journal of the Australian Traditional Medicine Society, 25(3), 148. ISSN 1326-3390.

[4] Direct, H. (2024) Liver failure, healthdirect.gov.au. Available at: https://www.healthdirect.gov.au/liver-failure#:~:text=low%20blood%20pressure-,Paracetamol%20overdose%20is%20the%20most%20common%20cause%20of%20acute%20liver,Centre%20on%2013%2011%2026. (Accessed: 2024).

[3] Gow PJ, Jones RM, Dobson JL, Angus PW. Etiology and outcome of fulminant hepatic failure managed at an Australian liver transplant unit. J Gastroenterol Hepatol 2004; 19: 154-159.

[2] CHARACTERIZATION OF BIOACTIVE PHYTOCHEMICALS FROM THE STEM BARK OF AFRICAN MAHOGANY Khaya senegalensis (MELIACEAE) Huaping Zhang 12-2008; https://tigerprints.clemson.edu/all_dissertations/305/. Journal of the Australian Traditional Medicine Society Vol25 No3 2019 pp146-149. Journal of the Australian Natural Therapists Association Vol34 No3 2020 pp63-65

[1] Anticancer Research (2006) 26(3 B) 2397-2405 Chemopreventive effects of Khaya senegalensis bark extract on human colorectal cancer; Androulakis X, Muga S, Chen F, et al; https://www.mendeley.com/catalogue/f7090483-0e6d-300e-8a4e-8ba7ac808564/. Journal of the Australian Traditional Medicine Society Vol25 No3 2019 pp146-149. Journal of the Australian Natural Therapists Association Vol34 No3 2020 pp63-65