Ask the Doc: How Fasting Affects Females Differently, Causes and Treatments for PMS, Why HbA1C is an ‘Unreliable’ Marker, and More
May 16, 2016
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Dr. Tommy Wood is back for his 4th round as our resident export for Ask the Doc. Tommy is a medical doctor, with degrees from Oxford University and Cambridge University. He’s currently working toward a Ph.D. in neonatal brain metabolism at the University of Oslo, Norway. He is also an athlete, specializes in working with endurance athletes, and he takes the functional approach to practicing medicine for optimal health, wellness and performance. Tommy consults with athletes via Nourish Balance Thrive. You can also submit a question to Tommy for future ATD episodes at firstname.lastname@example.org.
Announcements: Tommy will be speaking at the Biohacker Summit in London on May 21, and the Icelandic Health Symposium on May 26, along with Dr. Tim Noakes. Check it out if you’re in town!
On this show:
One supplement for all?
Causes and treatments for PMS
- Help for females with bad PMS issues that affect mood, athletic performance, and more
- Weeding through treatment options: 1) 5-HTP to manipulate neurotransmitters; 2) Better lifestyle management (i.e. meditation, forest bathing, positive attitude, eat well avoid sugar); 3) Supplement with chasteberry/St. John’s Wart (eg Women’s Phase 1).
- Late luteal phase leads to relative changes in each woman, i.e. drop in progesterone and estrogen
- The role of serotonin and dopamine; dopamine regulates prolactin
- Chasteberry, St. John’s Wort (SSRI) and supplements like Women’s Phase 1 – these can relieve symptoms but not getting to the “higher up” issue that is causing PMS issues
- Chasteberry’s mechanism of action
- Can B6 alleviate PMS issues?
- Neurotransmitters are linked to root cause of PMS issues, so to get answers look to production and turnover of neurotransmitters via Organic Acids test, i.e. 5-HIAA test to see if it’s low
- Do Organic Acids test during peak PMS
- Also a DUTCH hormone test to track female cycle and hormonal fluctuations
- Ronda Patrick & Bruce Ames paper on serotonin synthesis
- Patrick and Ames: “Vitamin D and the omega-3 fatty acids control serotonin synthesis and action, part 2: relevance for ADHD, bipolar disorder, schizophrenia, and impulsive behavior”
- Vitamin D deficiency Vitamin D response element on gene for tryptophan hydroxylase 2, whichc onverts tryptophan to 5-HTP
- Vitamin D deficiency can trigger PMS
- The role of Vitamin D – can too little make PMS even worse?
- The role of omega-3 fatty acids – how being deficient may worsen PMS, and thoughts on high-dosing fish oil with Nordic Naturals to alleviate symptoms; how much and can you have too much fish oil.
- Research paper titled “Update on Research and Treatment of Premenstrual Dysphoric Disorder”
- Fish oil and gut permeability
Intermittent fasting & fasting for women (not the same results as for men)
- Can IF/fasting work for guys but be detrimental for women?
- This well-written, well-researched article highlights potential harms of fasting for women (athlete or not) by Stefani of Paleo for Women
- Why Tommy and Tawnee never recommend alternate day fasting for females
- Most lab studies are using male rats, Tommy explain why, and also how this is not optimal to determine what’s best for women
- 6:1 ratio of male to female rats used in any research regarding the brain
- Women incur more stress with intermittent fasting, and if you then combine this with endurance exercise stress it becomes extra risky. Likely to develop into female athlete triad symptoms including loss of menstruation.
- What if a female (athlete or not) doesn’t care about having her period–is this ok? Tommy explains pros and cons.
- Ideal diet protocol for females: How to eat healthy, avoid crappy carbs, eat for fat adaptation but avoid doing damage of eating too little or fasting
- Tying this back in with menstruation:
- Females are most insulin sensitive during the follicular phase (1st phase)
- Females are more insulin resistant during luteal phase (2nd phase, including PMS time)
- Oddly, a high carb low fat meal can offset or mitigate PMS symptoms. On the other hand, eating high-fat low-carb during the luteal phase may be optimal for health and insulin response.
- Tawnee chimes in on her personal experience with diet during different phases.
Do we need carbs to be a good fat-burner?
- Do we literally need to ingest some carbs to allow for and/or optimize fat burning? Or can we go low carb/no carb pre- and during-training/races and still be a kick ass fat-burner?
- Low carb vs no carb = big difference
- Going too low carb/no carb can starve microbiome
- If you fast you don’t get mitochondrial biogenesis, we need/want mitochondrial biogenesis so don’t fast too much
- The role of AMPK – we want to stimulate AMPK because it has a positive effect on the way muscle cells use glucose and fatty acid oxidation
- Exercise is the most powerful physiological activator of AMPK
- More on glycogen cycling/replenishment for athletes and why it’s important!
Is HbAIC a poor predictor of blood sugar control and disease risk?
- EP fan says he’s doing it all right with diet, exercise, etc, yet HbA1C and fasting glucose were high. What gives?
- Most blood tests assess hemoglobin A1C (HbA1c) as a way to get a snapshot of blood sugar/glucose control for the past 90 days, screen for and diagnose diabetes and prediabetes in adults, but is it reliable?
- Tommy says his HbA1C is also highish as well, at 5.7%
- Article on HbA1C by Keith Runyan that we mention on the show as a good resource to back up our statements
- An A1C of 6.0 supposedly indicates blood glucose could have been 100-152; an A1C of 5.0% indicated blood glucose of 76-120.
- A1C is actually largely determined by genetics (up to 50%)
- Looking at RBCs – the average lifespan of an RBC is 115-120 days, but in athletes they may have increased turnover of RBCs due to foot strike hemolysis, and this could lead to higher MCV due to the blood cell breakdown
- Take-home: Don’t use A1C to calculate average blood glucose! Instead get an at-home glucometer to monitor especially 2-4 hours after eating.
- Supplies offered by Nourish Balance Thrive
- As for higher fasting blood glucose this could be due to higher stress, bad sleep, coffee, etc. Re-test.