Emerging research suggests that nutrient deficiencies may contribute to postpartum depression and addressing them may support recovery.

In this episode of The Science Chick Report, Dr. Kathleen Kendall-Tackett continues her series on practical, non-medical approaches that can support mothers experiencing postpartum depression. Many providers want to help but may not have access to specialized mental health services or extensive resources. Dr. Kendall-Tackett explains that even within those limits, there are practical steps that practitioners and mothers can consider that may support mental health and recovery.

This episode focuses on the role of nutrition and anti-inflammatory strategies in depression. Dr. Kendall-Tackett begins with vitamin D, one of the most common deficiencies worldwide. Because modern lifestyles limit sun exposure, many people do not produce enough vitamin D naturally. Research suggests that deficiency may contribute to increased inflammation and higher rates of depressive symptoms among mothers.

She then explores the role of vitamin B12, which helps regulate homocysteine, an inflammatory compound linked to depression. Low levels of B12 have been associated with significantly higher rates of postpartum depression, making it another nutrient worth evaluating.

The episode also discusses curcumin, the active compound in turmeric, which has been studied for its anti-inflammatory properties and potential benefits in treating depression and anxiety.

Finally, Dr. Kendall-Tackett addresses St. John’s wort, an herbal treatment widely used for depression in many parts of the world. While research suggests it can be effective for mild to moderate depression, she emphasizes the importance of caution due to potential interactions with medications.

For doulas, childbirth educators, nurses, and community health practitioners, this episode provides practical, science-based insights into nutritional approaches that may help support maternal mental health alongside traditional care.

In This Episode:

• (00:00) Introduction

• (26) Community and individual interventions overview

• (01:07) Vitamin D deficiency and maternal health

• (04:03) Research on vitamin D and depression

• (06:10) Vitamin B12 and postpartum depression

• (08:14) Accessibility and impact of vitamin D and B12

• (09:11) Curcumin (turmeric) as an anti-inflammatory supplement

• (11:31) Research on curcumin and mental health

• (12:30) St. John’s wort: appeal and cautions

• (13:21) St. John’s wort: history and mechanism

• (14:23) St. John’s wort: drug interactions and safety

• (15:24) St. John’s wort: effectiveness compared to antidepressants

• (17:17) St. John’s wort: use in major depression and global practices

• (19:16) St. John’s wort: dosage, standardization, and breastfeeding

• (21:14) St. John’s wort: quality control and recommendations

• (22:57) Conclusion and preview of next episode

• (23:30) Closing remarks

Notable Quotes:

• (03:57) “If you're deficient in vitamin D, one of the things that it does is it increases inflammation. When you've got inflammation, you've got depression.” — Dr. Kathleen Kendall-Tackett

• (05:18) "The higher your vitamin D, the lower your Edinburgh score which means lower depressive symptoms.”— Dr. Kathleen Kendall-Tackett

• (14:05) “I'd like to point out that lots and lots of things are natural that aren't safe. Lead is natural. Arsenic is natural. Asbestos is natural.” — Dr. Kathleen Kendall-Tackett

• (22:31) “It is natural doesn't mean you can take as much as you want and it will be safe.” — Dr. Kathleen Kendall-Tackett

Resources and Links

The Science Chick Report

• The Science Chick Report

Dr. Kathleen Kendall-Tackett

• Website

• LinkedIn

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• Facebook

• ResearchGate (upcoming paper)